Multiparameters Associated to Successful Weaning from VA ECMO in Adult Patients with Cardiogenic Shock or Cardiac Arrest: Systematic Review and Meta?Analysis

Venoarterial extracorporeal membrane oxygenation (VA ECMO) is a form of temporary mechanical circulatory support and simultaneous extracorporeal gas exchange for acute cardiorespiratory failure, including refractory cardiogenic shock (CS) and cardiac arrest (CA). Few studies have assessed predictors of successful weaning (SW) from VA ECMO. This systematic review and meta-analysis aimed to identify a multiparameter strategy associated with SW from VA ECMO. PubMed and the Cochrane Library and the International Clinical Trials Registry Platform were searched. Studies reporting adult patients with CS or CA treated with VA ECMO published from the year 2000 onwards were included. Primary outcomes were hemodynamic, laboratory, and echocardiography parameters associated with a VA ECMO SW. A total of 11 studies (n=653) were included in this review. Pooled VA ECMO SW was 45% (95%CI: 39�%, I2 7%) and in?hospital mortality rate was 46.6% (95%CI: 33�%; I2 36%). In the SW group, pulse pressure [MD 12.7 (95%CI: 7.3�) I2 = 0%] and mean blood pressure [MD 20.15 (95%CI: 13.8�.4 I2 = 0) were higher. They also had lower values of creatinine [MD �59 (95%CI: �9 to �2) I2 = 7%], lactate [MD �1 (95%CI: �4 to �7) I2 = 89%], and creatine kinase [�79.5 (95%CI: �87 to �1) I2 = 38%]. And higher left and right ventricular ejection fraction, MD 17.9% (95%CI: �2�.2) I2 = 91%, and MD 15.9% (95%CI 11.9�) I2 = 0%, respectively. Different hemodynamic, laboratory, and echocardiographic parameters were associated with successful device removal. This systematic review demonstrated the relationship of multiparametric assessment on VA ECMO SW.

Comparative study between suprasternal and apical windows: a user-friendly cardiac output measurement for the anesthesiologist

Abstract Introduction Transthoracic echocardiography is a safe and readily available tool for noninvasive monitoring of Cardiac Output (CO). The use of the suprasternal window situated at the sternal notch can be an alternative approach for estimating blood flow. The present study aimed to compare two methods of CO calculation. We compared the descending aorta Velocity-Time Integral (VTI) measurement from the suprasternal window view with the standard technique to determine CO that uses VTI measurements from the LVOT (Left Ventricular Outflow Tract) view. We also aimed to find out whether after basic training a non-echocardiographer operator can obtain reproducible measurements of VTI using this approach. Methods In the first part of the study, 26 patients without known cardiovascular diseases were evaluated and VTI data were acquired from the suprasternal window by a non-echocardiographer and an echocardiographer. Next, 17 patients were evaluated by an echocardiographer only and VTI and CO measurements were obtained from suprasternal and apical windows. Data were analyzed using the Bland and Altman method (BA), correlation and regression. Results We found a strong correlation between measurements obtained by a non-expert and an expert echocardiographer and detected that an inexperienced trainee can acquire VTI measurements from the suprasternal window view. Regarding agreement between CO measurements, data obtained showed a positive correlation and the Bland and Altman analysis presented a total variation of 38.9%. Conclusion Regarding accuracy, it is likely that TTE (Transthoracic Echocardiogram) measurements of CO from the suprasternal window view are comparable to other minimally invasive techniques currently available. Due to its user-friendliness and low cost, it can be a convenient technique for obtaining perioperative hemodynamic measurements, even by inexperienced operators.

Prevalence of subclinical systolic dysfunction in Takayasu's arteritis and its association with disease activity: a cross-sectional study

Abstract Background Takayasu's arteritis (TA) is a vasculitis that affects the aorta and its branches and causes stenosis, occlusion, and aneurysms. Up to 60% of TA patients are associated with cardiac involvement which confers a poor prognosis. Global longitudinal strain (GLS) analysis is an echocardiographic technique that can detect the presence of subclinical systolic dysfunction. Hence, this study aimed to describe the prevalence of subclinical systolic dysfunction in patients with TA using the GLS method and to correlate this finding with disease activity using the ITAS-2010 (Indian Takayasu Activity Score). Methods Thirty patients over 18 years of age who met the American College of Rheumatology (ACR) 1990 criteria for TA were included. The sample was submitted for medical record review, clinical and echocardiographic evaluation, and application of ITAS-2010. The cutoff for systolic dysfunction was GLS > - 20%. Results Of the 30 patients analyzed, 25 (83.3%) were female, and the mean age was 42.6 years (± 13.2). The median time since diagnosis was 7.5 years [range, 3-16.6 years], and the type V angiographic classification was the most prevalent (56.7%). Regarding echocardiographic findings, the median ejection fraction (EF) was 66% [61-71%] and the GLS was - 19.5% [-21.3 to -15.8%]. Although half of the participants had reduced GLS, only two had reduced EF. Eleven patients (33.%) met the criteria for activity. An association was found between disease activity and reduced GLS in eight patients (P = 0.02) using the chi-square test. Conclusion GLS seems to be an instrument capable of the early detection of systolic dysfunction in TA. The association between GLS and disease activity in this study should be confirmed in a study with a larger sample size.

Trombo en tránsito entre la aurícula derecha y la vena cava inferior en un paciente con contraindicación absoluta para trombólisis / Thrombus in transit between the right atrium and the inferior vena cava in a patient with an absolute contraindication for thrombolysis

Resumen La tromboembolia venosa es una condición relativamente común que se identifica en los servicios de urgencias y que representa morbilidad y mortalidad significativas en la población. Su desenlace más grave es la tromboembolia pulmonar, la cual desencadena una serie de procesos fisiopatológicos que pueden terminar en paro cardiaco y en la muerte posterior del paciente. Un trombo en las cavidades cardiacas derechas o en la vena cava es poco detectable; esta condición se conoce en la literatura como trombo en tránsito, y su hallazgo se asocia con alta mortalidad hospitalaria. A continuación, se presenta el caso de un paciente de sexo femenino, de 64 años de edad, con antecedente de cáncer uterino activo, hospitalizada por trombosis venosa profunda y en quien se tomó un ecocardiograma transtorácico de control que mostró un trombo en tránsito de alta movilidad en el límite entre la aurícula derecha y la vena cava inferior.

Abstract Venous thromboembolism is a relatively common condition that is identified in the emergency services and represents significant morbidity and mortality in the population. Its most severe outcome is pulmonary thromboembolism, which triggers several pathophysiological processes that can end in cardiac arrest and subsequent death of the patient. A thrombus found in the right cavities or in the vena cava is an undetectable process, this condition is known like ongoing thrombus. The finding of thrombus in transit has been associated with high hospital mortality. We present the case of a 64-year-old female patient with a history of active uterine cancer, who was hospitalized for deep vein thrombosis and in whom a control transthoracic echocardiogram is taken, showing evidence of a highly mobile thrombus in transit between the right atrium and inferior vena cava compatible with ongoing thrombus at this level.

Insuficiencia cardíaca de novo: Un reto diagnóstico / Di novo heart failure: A diagnostic challenge

Introducción: El término insuficiencia cardíaca de novo hace referencia a pacientes sin diagnóstico previo de dicha enfermedad. La revisión de este tema deviene de un problema real, pues muchos pacientes acuden a la atención secundaria sin diagnóstico previo de insuficiencia cardíaca y además en estadios avanzados. Objetivo: Describir los elementos claves para el diagnóstico precoz de insuficiencia Cardíacas. Métodos: Se llevó a cabo una búsqueda bibliográfica en las siguientes bases de datos: Pubmed, SciELO, ESBCO, Cochrane y BVS, así como en diferentes webs médicas durante tres meses entre febrero de 2021 al 31 de mayo de 2021. Conclusiones: El diagnóstico precoz de insuficiencia cardíaca permitió disminuir el número de pacientes que llegan a la Atención Secundaria sin diagnóstico previo. Existen clasificaciones que identifican estadios tempranos de la enfermedad y la de la ACC/AHA es relevante para lograr este objetivo. En atención primaria esto es un reto si no se emplean pruebas diagnósticas como el ecocardiograma. Es importante la determinación de las concentraciones circulantes del péptido natriurético tipo B (BNP) y del fragmento N-terminal de su protohormona (N-terminal BNP). Este biomarcador debería estar accesible en las consultas ambulatorias para pacientes que presentan sospecha clínica de insuficiencia cardíaca «de novo»(AU)

Introduction: The term di novo heart failure refers to patients without a previous diagnosis of this disease. The review of this issue comes from a real problem, since a group of patients attend secondary care without a previous diagnosis of heart failure and also have in advanced stages. Objective: The objective is to provide a clue that facilitates the early diagnosis of heart failure. Methods: A bibliographic search was carried out in the following databases: Pubmed, SciELO, ESBCO, Cochrane and BVS, as well as in different medical websites for three months (February 1, 2021 to May 31, 2021). Conclusions: The early diagnosis of heart failure will allow us to reduce the number of patients who arrive at Secondary Care without a previous diagnosis. There are classifications that identify early stages of the disease, being in our opinion the ACC / AHA classification the one that should carry the most weight. In primary care this can be a challenge if diagnostic tests such as echocardiography are not used. Dosification of serum levels of type B natriuretic peptide (BNP) and the N-terminal fragment of its protohormone (N-terminal BNP) is very useful. This biomarker should be accessible in outpatient clinics for patients with clinical suspicion of di novo heart failure(AU)

Prevalence of Cardiotoxicity Induced by Chemotherapy Measured by Dobutamine Stress Echocardiogram (DSE) in BSMMU

Background: Cardiotoxicity related to cancer treatment is an alarming source of significant morbidity and mortality, and may differ from subclinical myocardial dysfunction to irreversible heart failure or even death. DSE is a safe, feasible, and accurate modality for finding of myocardial ischemia and prognostication in patients with known or suspected coronary artery disease, particularly when they have limited exercise capacity.Materials& Methods:This study is a cross-sectional observational study which was conducted at the department of Cardiology, in BSMMU, Dhaka from June 2019- December 2019. The sample size for this study was 50.Results:The mean age was 56� where 17(34%) of the respondents were <65 years and 33(66%) were >65 years. The male respondent was 35(70%) where female was 15(30%). Diabetes was found in 3(6%) cases and followed by Acute ischemia, Hypertension 6(12%), Coronary Artery Disease (CAD) 4(8%), ACE-inhibitors 5(10%), Beta-blockers 3(6%), Nitrates 3(6%). Acute leukemia was found in 13(26%). in M12-18 was 45�and followed by mean of LVESD (mm) was 27� 29� 29� 30� 30� 31� Mean of IVSd (mm) was 9� 9� 9� 9� 8� 8� Mean of Peak E (cm/s) was 80�, 76�, 74�, 73�, 66� 63� and the p-value was seen <0.001 which denotes a significant improvement in treatment (p<0.005).Conclusions:The early discovery of cardiotoxicity may ensure the improved chemotherapeutic process and timely management of the treatment of cardiomyopathy, such as beta-blockers and ACE inhibitors.

A Curva Volume-Tempo Obtida pela Ecocardiografia Tridimensional na Cardiomiopatia Chagásica: Análise do Mecanismo das Adaptações Hemodinâmicas / The Volume-Time Curve by Three-Dimensional Echocardiography in Chagas Cardiomyopathy: Insights into the Mechanism of Hemodynamic Adaptations

Resumo Fundamento A ecocardiografia tridimensional (ECO 3D) permite a geração de uma curva volume-tempo representativa das alterações no volume ventricular esquerdo (VE) ao longo de todo o ciclo cardíaco. Objetivo O presente estudo tem como objetivo demonstrar as adaptações hemodinâmicas presentes na cardiomiopatia chagásica (CC) por meio das medidas de volume e fluxo obtidas pela curva volume-tempo por ECO 3D. Métodos Vinte pacientes com CC e 15 indivíduos saudáveis foram incluídos prospectivamente em um estudo de desenho transversal. Realizou-se ECO 3D em todos os indivíduos e as curvas volume-tempo do VE foram geradas. O fluxo foi obtido pela primeira derivada da curva volume-tempo por meio do software MATLAB. A significância estatística foi definida com p<0,05. Resultados Embora os pacientes com CC tivessem menor fração de ejeção do VE em comparação com o grupo controle (29,8±7,5 vs. 57,7±6,1, p<0,001), o volume (61,5±25,2 vs. 53,8±21,0, p=0,364) e o fluxo de ejeção máximo durante a sístole (-360,3±147,5 vs. -305,6±126,0, p = 0,231) mostraram-se semelhantes entre os grupos. Da mesma forma, o fluxo máximo na fase de enchimento inicial e durante a contração atrial mostrou-se semelhante entre os grupos. Um aumento na pré-carga expressa pelo volume diastólico final do VE (204,8±79,4 vs. 93,0±32,6), p<0,001) pode manter o fluxo e o volume ejetado semelhantes aos dos controles. Conclusão Com uma ferramenta não invasiva, demonstramos que o aumento no volume diastólico final do VE pode ser o principal mecanismo de adaptação que mantém o fluxo e o volume ejetado no cenário de disfunção sistólica ventricular esquerda severa.

Abstract Background Three-dimensional echocardiography (3D ECHO) allows the generation of a volume-time curve representative of changes in the left ventricular (LV) volume throughout the entire cardiac cycle. Objective This study aims to demonstrate the hemodynamic adaptations present in Chagas cardiomyopathy (CC) by means of the volume and flow measurements obtained by the volume-time curve by 3D ECHO. Methods Twenty patients with CC and 15 healthy subjects were prospectively enrolled in a cross-sectional design study. 3D ECHO was performed in all subjects and the volume over time curves of the LV was generated. The flow was obtained by the first derivative of the volume-time curve using the software MATLAB. Statistical significance was set at p<0.05. Results Although CC patients had lower LV ejection fraction compared to the control group (29.8±7.5 vs. 57.7±6.1, p<0.001), stroke volume (61.5±25.2 vs. 53.8±21.0, p=0.364) and maximum ejection flow during systole (-360.3±147.5 vs. -305.6±126.0, p=0.231) were similar between the groups. Likewise, the maximum flow in the early diastolic filling phase and during atrial contraction was similar between groups. An increase in preload expressed by LV end diastolic volume (204.8±79.4 vs. 93.0±32.6), p<0.001) may maintain the flow and stroke volumes similar to the controls. Conclusion Using a non-invasive tool, we demonstrated that an increase in LV end-diastolic volume may be the main adaptation mechanism that maintains the flow and stroke volumes in the setting of severe LV systolic dysfunction.

Rare Case of Sars COV2 Virus (COVID 19) Associated Intra Myocardial Hematoma and Role of Diagnostic Imaging

SARS Cov2 infection is a pandemic declared by WHO in early month of 2020 as corona virus disease (COVID 19) which was diagnosed first in Wuhan, China in December 2019. During first wave of COVID 19 we faced with severe acute respiratory insufficiency and respiratory failure with common symptoms of high-grade fever, shortness of breath and loss of sensations but later on we accessed the different symptoms to related with multi systems of human body. Cardiac emergencies or cardiovascular morbidities with mortality were accessed across the globe during COVID 19 pandemic era. Data revealed that SARS Cov2 affected on heart by both direct or indirect pathway which leads to acute myocarditis, myocardial injury/infarct, heart failure, thrombosis and arrhythmias. Here we are presenting a rare case as hematoma in myocardium called as intramyocardial dissecting hematoma. Non-invasive diagnostic tools to prevent mortality in cardiology field and avoid further complication.

Desempeño del método de suma de discos comparado con el método bidimensional en la estimación cuantitativa del derrame pericárdico / Performance of the method of disks compared to the bidimensional method in the quantitative estimation of pericardial effusion

Resumen Introducción: La ecocardiografía bidimensional es la técnica más efectiva para el diagnóstico del derrame pericárdico, gracias a sus altas sensibilidad y especificidad. Objetivo: Analizar la superioridad del método de suma de discos comparado con el método bidimensional en la estimación del derrame pericárdico por medio de ecocardiografía, tomando como referencia el volumen de líquido pericárdico extraído por pericardiocentesis o cirugía abierta. Método: Estudio retrospectivo de seguimiento de una cohorte basado en registros médicos y archivos de ecocardiografía. Se empleó un diseño pareado en el que cada imagen fue leída por el método bidimensional y por el método de suma de discos. Se incluyeron derrames pericárdicos graves, definidos clínicamente o por parámetros ecocardiográficos, que requirieran drenaje. El desempeño de los métodos de estimación bidimensional y de suma de discos, tomando como referencia la extracción por intervención, se cuantificó mediante áreas bajo la curva operador-receptor (auROC). Resultados: Se analizaron 40 registros, tomando como referencia el volumen obtenido por extracción; con un auROC de 0.81 (intervalo de confianza del 95% [IC95%]: 0.73-0.89), el desempeño diagnóstico del método de suma de discos fue significativamente mayor (p = 0.0335) que el del método bidimensional (auROC: 0.73; IC95%: 0.63-0.83). La estimación realizada por el método de suma de discos subestimó en promedio 51.3 ml (IC95%: −156.2-53.5). Conclusiones: En pacientes con derrame pericárdico e indicación de drenaje o taponamiento cardíaco, el método de suma de discos es superior en comparación con el método bidimensional en el estudio ecocardiográfico para la estimación cuantitativa del derrame pericárdico, ya que discrimina mejor respecto al método bidimensional.

Abstract Introduction: Two-dimensional echocardiography is the most effective technique for diagnosing pericardial effusion due to its high sensitivity and specificity. Objective: The superiority of the method of disks was compared with the bidimensional method in the estimation of pericardial effusion by echocardiography, taking as reference the volume of pericardial fluid removed by pericardiocentesis or open surgery. Method: Retrospective follow-up study of a cohort, based on medical records and echocardiography files. A paired design was used, each image was read by the bidimensional method and by the method of disks. Severe pericardial effusions defined clinically or by echocardiographic parameters, that required drainage were included. The performance of the bidimensional and disks estimation methods, taking the volume removed as a reference, was quantified using areas under the receiver operating characteristic curve (auROC). Results: 40 records were analyzed, taking as a reference the volume obtained by extraction, with an auROC of 0.81 (95% CI: 0.73-0.89) the diagnostic performance of the disks method was significantly higher (p = 0.0335) than the bidimensional method (auROC 0.73, 95% CI: 0.63-0.83). The estimate made by the disks method underestimated an average of 51.3 ml (95% CI: -156.2-53.5). Conclusions: In patients with pericardial effusion with indication of cardiac drainage or tamponade, the disks method is superior in comparison with the bidimensional method in the echocardiographic study of the quantitative estimation of pericardial effusion, discriminating better than the bidimensional method.

Application of 3.0 T non-contrast coronary MR angiography in children with Kawasaki disease / 中华放射学杂志

Objective:To explore the diagnostic accuracy and application value of 3.0 T non-contrast coronary magnetic resonance angiography (CMRA) in evaluating coronary artery in children with Kawasaki disease (KD).Methods:From May 2019 to January 2022, 75 children diagnosed with KD in our hospital were enrolled. All the patients underwent CMRA and transthoracic echocardiography (TTE) in one week, twenty-six of whom underwent coronary CT angiography (CCTA) or invasive coronary angiography (ICA) within two weeks. The diagnostic performance of CMRA and TTE was evaluated with CCTA/ICA as reference standard by per-patient basis, per-vessel basis, per-segment basis. Sensitivity and specificity of CMRA and TTE was compared by paired chi square test.The distribution of coronary artery aneurysm (CAA), thrombosis and other pathological changes of coronary artery were recorded and compared between two methods. The patients′ height and weight were collected to calculate the Z value. Z value>2.5 was defined as CAA.Results:All patients successfully completed CMRA examinations. Among the 26 patients, the sensitivity of CMRA was significantly higher than that of TTE by per coronary artery[97.7%(43/44)vs.84.1%(37/44), χ2=4.17, P<0.05]. CMRA showed a higher sensitivity than that of TTE both by proximal segments and middle/distal segments [97.7%(43/44)vs. 84.1%(37/44), 100%(21/21) vs. 52.4%(11/21), χ2=10.08, 7.11, both P<0.05). A total of 115 CAAs was found by CMRA, while only 87 (75.7%) CAAs were observed by TTE. Of the 28 (24.3%) CAAs missed by TTE, 16 (57.1%) were located in right coronary artery (RCA), 2(7.1%) in left main coronary artery, 7(25.0%) in left anterior ascending coronary artery (LAD) and 3(10.7%) in left circumflex coronary artery (LCX). Eleven (39.3%) missed CAAs by TTE were located in the proximal segment of RCA, LMCA, LAD and LCX, and 17 (60.7%) missed CAAs were located in the middle and distal segments. TTE missed coronary thrombosis in 5 patients compared with CMRA. Conclusions:3.0 T non-contrast CMRA is non-invasive and non-radiation, and the image quality can meet the needs of diagnosis, especially for detection of CAAs in RCA or in middle and distal segments of coronary artery in KD patients.

Diagnostic value of echocardiogram and cardiac magnetic resonance imaging for hypertrophic cardiomyopathy / 中国辐射卫生

Objective To compare echocardiogram and cardiac magnetic resonance imaging (MRI) for diagnosis of hypertrophic cardiomyopathy. Methods A total of 137 patients suspected of hypertrophic cardiomyopathy were recruited. All patients received three-dimensional echocardiogram followed by cardiac MRI, and the detection rate of hypertrophic cardiomyopathy was compared. Results A total of 96 eligible patients with hypertrophic cardiomyopathy were finally enrolledin this study, including 70 males (72.9%) and 26 females (27.1%), with a mean age of 48.2 ± 10.2 years. There was a significant difference in the detection rate of hypertrophic cardiomyopathy by echocardiogram (93.8%) and by cardiac MRI (100%) (χ2 = 4.30, P = 0.03). Among the 96 subjects, there was no significant difference in the mean value of maximum left ventricular wall thickness measured by echocardiogram and cardiac MRI (22.1 ± 8.9 vs 22.8 ± 9.2 mm; t = 1.23, P = 0.32). There was a significant difference in the mean thickness of the basal anterolateral free wall in the left ventricle (18.2 ± 7.8 vs 13.9 ± 7.1 mm; t = 9.40, P = 0.0007). Conclusion Cardiac MRI scanning is superior to echocardiogram for diagnosis of hypertrophic cardiomyopathy, which may be used as an effective supplement to conventional echocardiogram.

Strain longitudinal global como preditor de cardiotoxicidade induzida por quimioterapia / Global longitudinal strain as predictor of chemotherapy-induced cardiotoxicity

Fundamento: A cardiotoxicidade induzida por quimioterapia (CiC) é uma complicação importante entre os pacientes que recebem antraciclinas. Biomarcadores e parâmetros de imagem têm sido estudados por sua capacidade de identificar pacientes com risco de desenvolver essa complicação. O strain longitudinal global do ventrículo esquerdo (SLG-VE) tem sido descrito como um parâmetro sensível para detectar disfunção sistólica, mesmo na presença de fração de ejeção do ventrículo esquerdo (FEVE) preservada. Objetivo: avaliar o papel do SLG-VE como preditor de CiC. Métodos: O presente estudo consiste em uma análise post-hoc do estudo CECCY (Carvedilol for Prevention of ChemotherapyRelated Cardiotoxicity [Carvedilol para Prevenção da Cardiotoxicidade Relacionada à Quimioterapia]), que avaliou a prevenção primária de cardiotoxicidade com carvedilol durante quimioterapia com doxorrubicina em uma população com câncer de mama. Definiu-se cardiotoxicidade como uma redução >10% na FEVE. O SLG-VE foi obtido antes da quimioterapia em pacientes sem doença cardiovascular prévia ou anormalidades no ecocardiograma. Resultados: Trinta e um pacientes submetidos a estudo ecocardiográfico completo incluindo avaliação de SLG-VE antes da quimioterapia foram incluídos nesta análise. Um SLG-VE absoluto <16,9% antes da quimioterapia mostrou 100% de sensibilidade e 73% de especificidade para predizer cardiotoxicidade (AUC=0,85; IC 95% 0,680­0,959, p<0,001). Nesta população, os valores de FEVE antes da quimioterapia não foram preditores de CiC (IC 95% 0,478 a -0,842, p=0,17). A associação de baixos níveis séricos de SLG-VE (<17%) e BNP (>17 pg/mL) dois meses após a quimioterapia aumentou a precisão para detectar CiC de início precoce (100% de sensibilidade, 88% de especificidade, AUC=0,94; IC 95% 0,7810,995, p<0,0001). Conclusões: Nossos dados sugerem que o SLG-VE é um possível preditor de cardiotoxicidade induzida por quimioterapia. São necessários estudos maiores para confirmar a relevância clínica desse parâmetro ecocardiográfico nesse cenário clínico. (AU)

Background: Chemotherapy-induced cardiotoxicity (ChC) is an important complication among patients receiving anthracyclines. Biomarkers and imaging parameters have been studied for their ability to identify patients at risk of developing ChC. Left ventricular global longitudinal strain (LV-GLS) is a sensitive parameter for detecting systolic dysfunction despite the presence of preserved left ventricular ejection fraction (LVEF). Objective: To evaluate the role of the LV-GLS as a predictor of ChC. Methods: This was a post-hoc analysis of the Carvedilol for Prevention of Chemotherapy-Related Cardiotoxicity trial, which evaluated the primary prevention of cardiotoxicity with carvedilol during doxorubicin chemotherapy in a population of patients with breast cancer. Cardiotoxicity was defined as a reduction ≥10% in LVEF. LV-GLS was determined before chemotherapy in patients with no prior cardiovascular disease or echocardiogram abnormalities. Results: Thirty-one patients for whom a complete echocardiography study including measurement of LV-GLS was performed before chemotherapy were included in this analysis. An absolute LV-GLS<16.9% before chemotherapy showed 100% sensitivity and 73% specificity for predicting cardiotoxicity (area under the curve [AUC], 0.85; 95% confidence interval [CI], 0.680­0.959; p<0.001). In this population, LVEF values before chemotherapy did not predict ChC (95% CI, 0.478 to -0.842; p=0.17). The association of low LV-GLS (<17%) and brain-type natriuretic peptide serum levels (>17 pg/mL) at 2 months after chemotherapy increased the accuracy for detecting early-onset ChC (100% sensitivity, 88% specificity; AUC, 0.94; 95% CI, 0.781­0.995; p<0.0001). Conclusions: Our data suggest that LV-GLS is a potential predictor of ChC. Larger studies are needed to confirm its clinical relevance in this clinical setting. (AU)

Triatriatum sinistrum em adulto assintomático: relato de caso / Cor triatriatum sinistrum in an asymptomatic adult: a case report

Cor triatriatum é um anomalia cardíaca congênita rara frequentemente diagnosticada na primeira infância. Este estudo de caso apresenta um adulto com um achado acidental de cor triatriatum sinistrum. Com base na apresentação clínica, o paciente foi tratado de forma conservadora. São apresentados achados de imagens ecocardiográficas de cor triatriatum sinistrum deste paciente juntamente de revisão narrativa da literatura sobre essa doença.(AU)

Cor triatriatum is a rare congenital heart anomaly often diagnosed in early childhood. This case study features an adult with an incidental finding of cor triatriatum sinistrum. Based on the clinical presentation, the patient was treated conservatively. Cor triatriatum sinistrum echocardiographic image findings of this patient are presented along with a narrative review of the literature about this disease. (AU)

Segurança do Agente de Contraste SF6 (SonoVueⓇ) no Ecocardiograma sob Estresse Farmacológico / Safety of SF6(SonoVue®) Contrast Agent on Pharmacological Stress Echocardiogram

Resumo Fundamento Em 2007, a Food and Drug Administration (FDA) determinou revisões sobre segurança dos agentes de contraste ecocardiográfico (ACE) disponíveis no mercado após relatos de mortes. Ao longo desses anos, diversos estudos comprovaram a segurança dos ACE, porém com poucos estudos relacionados ao SonoVue®. Objetivos Avaliar a segurança do SonoVue® durante o ecocardiograma sob estresse farmacológico (EEF) por meio da análise da incidência de reações alérgicas e da comparação entre os grupos quanto ao surgimento de arritmia, efeitos colaterais menores e eventos adversos. Métodos Estudo observacional, prospectivo, no qual 2.346 pacientes foram submetidos ao EEF e divididos em dois grupos: grupo 1 com ACE (n=1.099) e grupo 2 sem ACE (n=1.247). Os pacientes foram avaliados durante o EEF - 24 horas e 30 dias. Foi definido p significativo quando <0,05. Resultados O grupo 1 apresentou efeitos colaterais mais leves, como cefaleia (5/0,5% vs. 19/1,5%, p=0,012) e hipertensão reativa (3/0,3% vs . 19/1,5%, p=0,002), menos arritmias como extrassístoles ventriculares (180/16,4% vs . 247/19,8%, p=0,032) e taquicardia paroxística supraventricular (2/0,2% vs . 15/1,2%, p=0,003), assim como nenhum evento adverso como infarto agudo do miocárdio (IAM) e óbito. No grupo 2, um paciente apresentou IAM <24h (1/01%) e dois óbitos <30 dias (2/0,1%). Urticária relacionada ao SonoVue® foi observada em 3 (0,3%) pacientes sem reação anafilática. Conclusão SonoVue® demonstrou segurança durante o EEF, não sendo observados morte, IAM ou reação anafilática. Observou-se menor incidência de efeitos colaterais mais leves e arritmias no grupo que utilizou o ACE, assim como baixa incidência de reações alérgicas leves.

Abstract Background In 2007, the United States Food and Drug Administration mandated safety reviews of commercially available echocardiographic contrast agents (ECA), following reports of death. During the past years, different studies have proven the safety of ECA, but there have been few studies on SonoVue®. Objectives To evaluate the safety of SonoVue® during pharmacological stress echocardiography (PSE), by analyzing the incidence of allergic reactions and comparing groups regarding the appearance of arrhythmia, minor side effects and adverse events. Methods In this observational, prospective study, 2346 patients underwent PSE, and they were divided into the following 2 groups: group 1 with ECA (n = 1099) and group 2 without ECA (n = 1247). Patients were evaluated during PSE, at 24 hours, and at 30 days. Statistical significance was defined as p < 0.05. Results Group 1 had fewer minor side effects, such as headache (5/0.5% versus 19/1.5%, p = 0.012) and less reactive hypertension (3/0.3% versus 19/1.5%, p = 0.002); fewer arrhythmias, such as ventricular extrasystoles (180/16.4% versus 247/19.8%, p = 0.032) and paroxysmal supraventricular tachycardia (2/0.2% versus 15/1.2%, p = 0.003); and no adverse events, such as acute myocardial infarction (AMI) or death. In group 2, 1 patient had AMI in < 24 hours (1/01%), and there were 2 deaths in < 30 days (2/0.1%). SonoVue®-related urticaria was seen in 3 (0.3%) patients, without anaphylactic reaction. Conclusion SonoVue® demonstrated safety during PSE. No cases of death, AMI, or anaphylactic reaction were observed. There was a lower incidence of minor side effects and arrhythmias in the group that received ECA, as well as a low incidence of mild allergic reactions.

Valor diagnóstico del índice de Sokolow-Lyon en la hipertrofia ventricular izquierda

RESUMEN Introducción: La hipertrofia de ventrículo izquierdo constituye un gran problema entre los pacientes con hipertensión arterial a nivel mundial, además se relaciona con diversas enfermedades, las cuales pueden ser fatales. Objetivo: Evaluar el rendimiento diagnóstico del índice de Sokolow-Lyon en derivaciones precordiales para la hipertrofia de ventrículo izquierdo. Método: Se realizó un estudio de medios diagnósticos de tipo observacional, analítico y transversal. Se estudiaron 122 pacientes ingresados en los servicios de Medicina Interna, Nefrología y Neurología del Hospital Militar Carlos J. Finlay (La Habana, Cuba) de enero del 2017 a marzo del 2019, a los cuales se les realizó ecocardiograma y electrocardiograma. Resultados: Existió un predominio de la población mayor de 45 años (77,9%), del sexo masculino (59,8%) y con hipertensión arterial (77,0%). Se realizó una descripción cualitativa del índice electrocardiográfico de Sokolow-Lyon para precordiales en el total de casos estudiados y se encontró una prevalencia de hipertrofia ventricular izquierda de 71,3%. Este criterio de voltaje presentó una alta especificidad (83%), alto valor predictivos positivo (85%) y una razón de verosimilitud (likelihood ratio) positiva de 2,28. Conclusiones: En pacientes hospitalizados, donde la prevalencia de hipertensión arterial es elevada, el criterio de Sokolow-Lyon presentó alta utilidad diagnóstica para la hipertrofia de ventrículo izquierdo, así como para confirmar los casos que verdaderamente la padecían.

ABSTRACT Introduction: Left ventricular hypertrophy is a major problem among patients with high blood pressure worldwide; it is also related to various entities, which can be fatal. Objective: To evaluate the diagnostic performance of the Sokolow-Lyon index in precordial leads for left ventricular hypertrophy. Method: An observational, analytical and cross-sectional study of diagnostic means was carried out. One hundred and twenty-two patients admitted to the Departments of Internal Medicine, Nephrology and Neurology of the Hospital Militar Carlos J. Finlay (Havana, Cuba) were studied from January 2017 to March 2019, who underwent echocardiography and electrocardiogram. Results: There was a predominance of the population over 45 years old (77.9%), males (59.8%) and with high blood pressure (77.0%). A qualitative description of the Sokolow-Lyon electrocardiographic index for precordial leads was performed in the total number of the studied cases, and a prevalence of 71.3% of left ventricular hypertrophy was found. This voltage criterion showed high specificity (83%), high positive predictive values ​​(85%) and positive likelihood ratio at 2.28. Conclusions: In admitted patients, where the prevalence of high blood pressure is elevated, the Sokolow-Lyon criterion presented high diagnostic usefulness for left ventricular hypertrophy as well as to confirm the cases that actually present it.

Endocarditis infecciosa con hemocultivos negativos en prolapso de la válvula mitral. Presentación de caso / Infective endocarditis with negative blood cultures in mitral valve prolapse. Case presentation

Introducción: La Endocarditis infecciosa sigue desafiando a la Medicina moderna a pesar de no ser una entidad frecuente. Objetivo: Se presenta un caso con una lesión valvular previa no diagnosticada antes, y sin síntomas, y que se consideró el diagnóstico tempranamente de endocarditis en el nivel hospitalario. Presentación del caso: Paciente de 20 años, mujer, con antecedentes de salud referidos, fumadora. Ingresa en sala del Servicio de Medicina el 21 de enero de 2020 por fiebres que se mantienen todo el día de 38-38,50 C, con picos que alcanzan los 400 C con escalofríos en determinados momentos. Desde hace un mes presenta esta sintomatología. Ruidos cardiacos rítmicos, taquicárdicos, de buena intensidad. Clic sistólico con arrastre sistólico fuerte de regurgitación IV/VI audible en foco mitral con frémito que se irradia a la axila, anemia, VSG acelerada, leucocitosis con desviación izquierda, hemocultivos negativos y en ecocardiograma prolapso de válvula mitral, valva anterior y posterior, con regurgitación que ocupa toda la aurícula izquierda hasta el techo de la misma. Múltiples vegetaciones en cara auricular de valva posterior de válvula mitral, la mayor de 7 x 3 mm. Conclusiones: El método clínico es fundamental en el proceso diagnóstico en la práctica clínica secundado por los medios diagnósticos como en la enfermedad que nos ocupa(AU)

Introduction: Infective endocarditis continues to be a great challenge for modern medicine although it is not a frequent entity. Objective: We present a case of an undiagnosed previous valve lesion without symptoms. The early diagnosis of endocarditis was made at the hospital level. Case Presentation: A 20-year-old woman, smoker, with previous history of good health was admitted to the medical ward on January 21, 2020. The patient reported continuous fever (38-38,50 C) throughout the day, with spikes up to 400 C and intermittent chills. She has been having these symptoms for a month. Rhythmic heart sounds and high intensity tachycardia and systolic click with strong systolic displacement of regurgitation grade IV/VI audible in mitral area with fremitus radiating to the armpit were heard. Anemia, accelerated ESR, leukocytosis with left deviation, and negative blood cultures were confirmed. The echocardiogram showed a mitral valve prolapse with regurgitation of anterior and posterior valves that occupies all the left atrium until its top. There was multiple vegetation in the atrial side of the posterior leaflet of the mitral valve; the greatest is 7 x 3 mm. Conclusions: The clinical method is essential in the diagnostic process performed in clinical practice supported by diagnostic means, as in the current case(AU)

Diagnóstico ecocardiográfico de una hernia de hiato. Reporte de un caso / Echocardiographic diagnosis of a Hiatus Hernia: A case report

The diagnosis of a hiatus hernia (HH) is typically confirmed with an upper gastrointestinal barium X-ray, gastroscopy or upper-intestinal endoscopy. In several cases, HH has been diagnosed with an echocardiogram. We here describe a case of an HH visible on an echocardiogram in a male patient with chest pain.

The impact of obstructive sleep apnea on cardiac structure and function in elderly patients with type 2 diabetes mellitus / 中华老年医学杂志

Objective:To investigate the impact of obstructive sleep apnea(OSA)on cardiac structure and function in elderly patients with type 2 diabetes mellitus(T2DM).Methods:This was a case-control study.Elderly patients with T2DM aged 65 years and above at the Department of Geriatrics of Tianjin Medical University General Hospital were consecutively enrolled in this study, and eventually 61 patients with complete general information were included.All patients were examined with polysomnography(PSG). They were divided into the T2DM group and the T2DM+ OSA group based on whether there was concurrent OSA.Differences in cardiac structure and function were compared between the two groups and between patients with mild OSA and those with moderate-severe OSA.The correlation of OSA with cardiac structure and function in T2DM patients was analyzed by using Pearson correlation and multiple linear regression analysis.Results:The left ventricular ejection fraction(LVEF)was lower in the T2DM+ OSA group than in the T2DM group(52.38±4.70 % vs.56.34±5.92%, t=2.892, P=0.005). The anteroposterior diameter of the right ventricle, inter-ventricular septum thickness and left ventricular posterior wall thickness increased in the T2DM+ OSA group compared with the T2DM group(21.50±1.49 mm vs.20.55±1.05 mm, 10.21±0.88 mm vs.9.52±1.04 mm, 10.42±0.83 mm vs.9.83±0.83 mm, t=-2.670, -2.770 and -2.716, P=0.010, 0.007 and 0.009). LVEF was lower in patients with moderate-severe OSA than in those with mild OSA group(50.58±3.55% vs.55.83±4.83%, t=3.813, P=0.001). The anteroposterior diameter of the right ventricle, inter-ventricular septum thickness and left ventricular posterior wall thickness were greater in patients with moderate-severe OSA than in those with mild OSA(21.86±1.39 mm vs.20.79±1.46 mm, 10.48±0.82 mm vs.9.69±0.75 mm, 10.68±0.80 mm vs.9.92±0.64 mm, t=-2.231, -2.871 and -2.943, P=0.032, 0.007 and 0.006). Pearson correlation analysis showed that the Apnea Hypopnea Index(AHI)was correlated with LVEF, the anteroposterior diameter of the right ventricle, inter-ventricular septum thickness and left ventricular posterior wall thickness( r=-0.425, 0.340, 0.458 and 0.473, P=0.001, 0.007, <0.001 and <0.001). After adjusting for age, body mass index, systolic blood pressure and triglycerides, multiple linear regression analysis showed that AHI was also correlated with LVEF, the anteroposterior diameter of the right ventricle, inter-ventricular septum thickness and left ventricular posterior wall thickness( β=-0.385, 0.520, 0.604 and 0.388, P=0.036, 0.011, 0.001 and 0.039). Conclusions:OSA aggravates cardiac remodeling and systolic insufficiency in T2DM patients and may be related to the severity of intermittent hypoxia.

Lo mejor del Congreso Uruguayo de Cardiología 2020

El 37.o Congreso Uruguayo de Cardiología se llevó a cabo exclusivamente en modalidad virtual, del 26 al 28 de mayo. Contó con invitados nacionales e internacionales, permitiendo el desarrollo de un espacio de actualización en distintas áreas de la cardiología. Al igual que en años anteriores, se destinó un espacio a la actividad científica efectuada por investigadores nacionales mediante la presentación de temas libres. Durante 2020 se presentaron diversos trabajos en este formato que fueron sometidos a un proceso de revisión y aprobación por el comité científico, cuya presentación fue diferida por la pandemia por COVID-19. A continuación, comentamos algunos de los trabajos presentados en el congreso, a saber: Implante primario de marcapaso definitivo cardíaco en población pediátrica y evolución: experiencia de 15 años en centro de referencia cardiológico pediátrico en Uruguay. Calidad de la anticoagulación oral con warfarina en una policlínica de cardiología, seguimiento de un año. Valor pronóstico de la anemia leve/moderada y/o la ferropenia preoperatoria en el posoperatorio de cirugía cardíaca. Impacto pronóstico del ecocardiograma de estrés con ejercicio físico negativo en una unidad de dolor torácico. Período 2019-2020 con seguimiento a un año. Estrategia invasivoconservadora en el infarto con elevación del ST. Prueba de concepto. Impacto cardiovascular de la pandemia por COVID-19 durante el primer semestre de 2020 en Uruguay. Estudio ecológico. Correlación entre parámetros hemodinámicos y captación de 18F-fluoruro mediante PET a corto plazo luego de sustitución valvular aórtica. Indicación, resultados y mortalidad de la angioplastia coronaria con implante de stent en tronco de arteria coronaria izquierda no protegido.

Summary: The 37th Uruguayan Congress of Cardiology was held in virtual mode, from May 26 to 28. It had national and international guests, allowing the development of an update space in different areas of cardiology. As in previous years, a space was set aside to present the scientific activity carried out by national researchers through the presentation of free topics. Various free topics of 2020 were reviewed and approved by the scientific committee, whose presentation was deferred due to the COVID-19 pandemic. Below we comment on some of the papers presented at the congress, as follows: Primary implantation of a definitive cardiac pacemaker in the pediatric population and evolution: 15 years of experience in a pediatric cardiology referral center in Uruguay. Quality of oral anticoagulation with warfarin in a cardiology polyclinic, one-year follow-up. Prognostic value of mild/moderate anemia and/or preoperative iron deficiency in the postoperative period of cardiac surgery. Prognostic impact of stress echocardiography with negative physical exercise in a chest pain unit. 2019-2020 period with one-year follow-up. Invasiveconservative strategy in ST elevation infarction. Proof of concept. Cardiovascular impact of the COVID-19 pandemic during the first half of 2020 in Uruguay. Ecological study. Correlation between hemodynamic parameters and 18 F-fluoride uptakes by PET in the short term after aortic valve replacement. Indication, results and mortality of coronary angioplasty with unprotected left main coronary artery stent implantation.

O 37.o Congresso Uruguaio de Cardiologia foi realizado de forma virtual, de 26 a 28 de maio. Contou com convidados nacionais e internacionais, permitindo o desenvolvimento de um espaço de atualização nas diferentes áreas da cardiologia. À semelhança dos anos anteriores, foi reservado um espaço para a apresentação da atividade científica desenvolvida por investigadores nacionais através da apresentação de temas livres. Foram apresentados diversos temas livres revisados e selecionados pela comissão científica correspondente ao ano de 2020, cuja apresentação foi adiada devido à pandemia do COVID-19. A seguir comentamos alguns dos trabalhos apresentados no congresso. Implante primário de marcapasso cardíaco definitivo na população pediátrica e evolução: 15 anos de experiência em centro de referência em cardiologia pediátrica no Uruguai. Qualidade da anticoagulação oral com varfarina em policlínica de cardiologia, seguimento de um ano. Valor prognóstico de anemia leve/moderada e/ou deficiência de ferro pré-operatória no pós-operatório de cirurgia cardíaca. Impacto prognóstico da ecocardiografia sob estresse com exercício físico negativo em uma unidade de dor torácica. Período 2019-2020 com acompanhamento de um ano. Estratégia invasivoconservadora no infarto com supra desnivelamento de ST. Prova de conceito. Impacto cardiovascular da pandemia COVID-19 durante o primeiro semestre de 2020 no Uruguai. Estudo ecológico. Correlação entre parâmetros hemodinâmicos e captação de fluoreto de 18F por PET em curto prazo após a troca da válvula aórtica. Indicação, resultados e mortalidade de angioplastia coronária com implante de stent de tronco de coronária esquerda desprotegido.

Degeneración valvular en pacientes con bioprótesis aórtica porcina evaluada mediante PET con 18Ffluoruro de sodio / Valve degeneration in patients with aortic porcine bioprosthesis evaluated through 18Fsodium fluoride PET / Degeneração valvular em pacientes com bioprótese aórtica suína avaliada mediante PET com fluoreto18F

Introducción: la degeneración valvular protésica es un problema clínico; los métodos de imagen convencionales permiten diagnosticarla en las últimas etapas. La tomografía por emisión de positrones (PET) con 18Ffluoruro puede detectar de manera precoz la degeneración subclínica. Objetivo: correlacionar parámetros de deterioro estructural protésico por PET con parámetros hemodinámicos ecocardiográficos al año de la sustitución valvular aórtica (SVA) por bioprótesis porcina. Métodos: estudio prospectivo ad hoc de un ensayo clínico. Se reclutaron pacientes sometidos a SVA por bioprótesis porcina en dos centros nacionales entre el 01/01/2019 y el 13/02/2020. Se realizaron controles clínicos y ecocardiográficos. Se seleccionaron aleatoriamente 19 sujetos a los que se les realizó PET 18Ffluoruro de sodio con angiotomografía al año de la SVA. Se midió la captación del trazador en la válvula (SUVavV) y aurícula derecha (SUVavA), calculando el índice SUVavV/SUVavA, que se comparó con los gradientes ecocardiográficos medio y máximo al año, mediante análisis de correlación de Spearman. Resultados: de 140 sujetos sometidos a SVA se realizó PET a 19, a los 16,3 meses (15,9-16,9) luego de la SVA. La mediana del índice SUVavV/SUVavA fue de 1,17 (1,11-1,27). Se encontró una correlación negativa moderada entre la captación de 18Ffluoruro y el gradiente medio (coeficiente de correlación -0,516, p = 0,028) y máximo (coeficiente -0,589, p = 0,010) al año. Conclusiones: en el seguimiento de los pacientes en los que se le realizó una sustitución valvular aórtica con bioprótesis, encontramos valores bajos de captación en el PET y gradientes ecocardiográficos normales con una correlación negativa moderada entre estos hallazgos

Introduction: prosthetic valve degeneration is a relevant clinical disorder; conventional imaging methods allow diagnosis in the later stages. 18Ffluoride positron emission tomography (PET) can detect subclinical degeneration earlier. Objective: correlate parameters of prosthetic structural deterioration by PET with echocardiographic hemodynamic parameters one year after aortic valve replacement (AVR) by porcine bioprosthesis. Methods: prospective ad hoc study of a clinical trial. Patients undergoing AVR by porcine bioprosthesis were recruited in two national centers between 01/01/2019 and 02/13/2020. Clinical and echocardiographic controls were carried out. 19 subjects were randomly selected and underwent 18Fsodium fluoride PET with CT angiography one year after AVR. Tracer uptake in the valve (SUVavV) and right atrium (SUVavA) was measured, creating the SUVavV/SUVavA index, which was compared with the mean and maximum gradients at one year, using Spearman's correlation analysis. Results: of a total of 140 subjects, PET was performed on 19 at 16.3 months (15.9-16.9) after the AVR. The median SUVavV/SUVavA ratio was 1.17 (1.11-1.27). A moderate negative correlation was found between. 18Ffluoride uptake and the mean gradient (correlation coefficient -0.516, p = 0.028) and maximum (coefficient of -0.589, p = 0.010) at one year. Conclusions: we found low uptake values in PET, echocardiographic gradients in normal range and no positive correlation between both parameters. It is the first national report with these imaging techniques

Introdução: a degeneração da válvula protética é um problema clínico; os métodos convencionais de imagem permitem o diagnóstico nas fases posteriores. A tomografia por emissão de pósitrons (PET) com fluoreto18F pode detectar a degeneração subclínica precocemente. Objetivo: correlacionar parâmetros de deterioração estrutural protética por PET com parâmetros hemodinâmicos ecocardiográficos após um ano da troca valvar aórtica (SVA) por bioprótese suína. Métodos: estudo ad hoc prospectivo de um ensaio clínico. Pacientes submetidos a SVA por bioprótese suína foram recrutados em dois centros nacionais entre 01/01/2019 e 13/02/2020. Foram realizados controles clínicos e ecocardiográficos. 19 indivíduos foram selecionados aleatoriamente que foram submetidos a PET com fluoreto de sódio 18F com angiotomografia um ano após AVS. A captação do traçador na válvula (SUVavV) e átrio direito (SUVavA) foi medida, criando o índice SUVavV/SUVavA, que foi comparado com os gradientes médio e máximo em um ano, usando a análise de correlação de Spearman. Resultados: de um total de 140 indivíduos submetidos a SVA, PET foi realizado em 19, em 16,3 meses (15,9-16,9) após a SVA. A proporção média de SUVavV/SUVavA foi de 1,17 (1,11-1,27). Uma correlação negativa moderada foi encontrada entre a captação de fluoreto18F e o gradiente médio (coeficiente de correlação -0,516, p = 0,028) e máximo (coeficiente de -0,589, p = 0,010) em um ano. Conclusões: encontramos valores baixos de captação na PET, gradientes ecocardiográficos dentro da normalidade, sem correlação positiva entre os dois parâmetros. É o primeiro trabalho nacional com essas técnicas de imagem