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1.
Arq. bras. cardiol ; 113(6): 1092-1101, Dec. 2019. tab, graf
Article in English | LILACS | ID: biblio-1055064

ABSTRACT

Abstract Background: Functional assessment to rule out myocardial ischemia using coronary computed tomography angiography (CCTA) is extremely important and data on the Brazilian population are still limited. Objective: To assess the diagnostic performance of myocardial perfusion by CCTA in the detection of severe obstructive coronary artery disease (CAD) compared with single-photon emission computerized tomography (SPECT). To analyze the importance of anatomical knowledge to understand the presence of myocardial perfusion defects on SPECT imaging that is not identified on computed tomography (CT) scan. Method: A total of 35 patients were evaluated by a simultaneous pharmacologic stress protocol. Fisher's exact test was used to compare proportions. The patients were grouped according to the presence or absence of significant CAD. The area under the ROC curve was used to identify the diagnostic performance of CCTA and SPECT in perfusion assessment. P < 0.05 values were considered statistically significant. Results: For detection of obstructive CAD, CT myocardial perfusion analysis yielded an area under the ROC curve of 0.84 [a 95% confidence interval (CI95%): 0.67-0.94, p < 0.001]. SPECT myocardial perfusion imaging, on the other hand, showed an AUC of 0.58 (95% CI 0.40 - 0.74, p < 0.001). In this study, false-positive results with SPECT are described. Conclusion: Myocardial perfusion analysis by CTA displays satisfactory results compared to SPECT in the detection of obstructive CAD. CCTA can rule out false-positive results of SPECT.


Resumo Fundamento: A avaliação funcional para descartar a isquemia miocárdica utilizando a angiotomografia computadorizada (angio-TC) de coronárias é de extrema importância e dados na população brasileira ainda são escassos. Objetivo: Avaliar o desempenho diagnóstico da perfusão miocárdica pela angio-TC de coronárias na detecção de doença arterial coronariana (DAC) obstrutiva significativa em comparação com a tomografia computadorizada por emissão de fóton único (SPECT; do inglês, single photon emission computerized tomography). Analisar a importância do conhecimento anatômico para entender a presença de defeito de perfusão miocárdica pela SPECT que não é identificado pela tomografia computadorizada (TC). Método: Trinta e cinco pacientes foram avaliados por um protocolo de estresse farmacológico simultâneo. O teste exato de Fisher foi utilizado para comparação entre as proporções. Os pacientes foram agrupados de acordo com a presença ou não de DAC significativa. A área sob a curva foi utilizada para identificar o desempenho diagnóstico da avaliação da perfusão pela angio-TC de coronárias e pela SPECT. Os valores de p < 0,05 foram considerados estatisticamente significativos. Resultados: Para detecção de DAC obstrutiva a avaliação da perfusão miocárdica pela TC teve uma área sob a curva de 0,84 [intervalo de confiança de 95% (IC95%): 0,67 a 0,94, p < 0,001]. Já o estudo da perfusão miocárdica pela SPECT foi de 0,58 (IC95%: 0,40 a 0,74, p < 0,001). Neste estudo, foram descritos falso-positivos pela SPECT. Conclusão: A avaliação da perfusão miocárdica pela angio-TC apresenta resultados satisfatórios em comparação com os da SPECT na detecção de DAC obstrutiva. A angio-TC de coronárias tem capacidade de afastar falso-positivos da SPECT.


Subject(s)
Humans , Male , Female , Middle Aged , Coronary Artery Disease/diagnostic imaging , Tomography, Emission-Computed, Single-Photon/methods , Coronary Angiography/methods , Myocardial Perfusion Imaging/methods , Coronary Artery Disease/physiopathology , Cineangiography/methods , Myocardial Reperfusion Injury/physiopathology , Myocardial Reperfusion Injury/diagnostic imaging , ROC Curve , Sensitivity and Specificity , Computed Tomography Angiography
3.
Int. j. cardiovasc. sci. (Impr.) ; 32(2): 177-189, mar.-abr. 2019. ilus
Article in English | LILACS | ID: biblio-988239

ABSTRACT

Amyloidosis is a disease caused by extracellular deposition of insoluble protein fibrils, that results in changes in tissue architecture and consequently modification of the organ structure. Cardiac involvement is common in amyloidosis. Two major types of systemic amyloidosis affect the myocardium ­ immunoglobulin light chain and transthyretin amyloidosis ­ each leading to different prognosis. Early detection and diagnosis of cardiac amyloidosis are the main objectives in the assessment of the disease. New techniques of magnetic resonance imaging have minimized the need for biopsies for the diagnosis. Late gadolinium enhancement technique, and more recently T1 mapping, have allowed a simplified evaluation of amyloid deposits and extracellular volume. The aim of this review was to describe basic concepts and updates of the use of magnetic resonance imaging for the diagnosis amyloidosis and evaluation of its severity


Subject(s)
Humans , Male , Female , Magnetic Resonance Imaging/methods , Amyloidosis/diagnosis , Amyloidosis/therapy , Prognosis , Diagnostic Imaging/methods , Echocardiography/methods , Biomarkers , Immunoglobulin Light Chains , Contrast Media , Plaque, Amyloid/diagnostic imaging , Electrocardiography/methods , Gadolinium , Heart Ventricles , Myocarditis/pathology
5.
An. bras. dermatol ; 91(1): 73-79, Jan.-Feb. 2016. graf
Article in English | LILACS | ID: lil-776425

ABSTRACT

Abstract In Brazil, without considering the non-melanoma skin tumors, bladder cancer in men is the eighth most common, and the urothelial carcinoma or transitional cell carcinoma is the most common among these. Cutaneous metastases from urothelial neoplasms appear as single or multiple erythematous, infiltrated nodules or plaques, and like other cases of distant disease, it is indicative of poor prognosis. The invasive urothelial carcinoma is recognized for its ability to present divergent differentiation and morphological variants. The sarcomatoid urothelial carcinoma is a rare cancer that consists of two different components: one composed of epithelial tissue and the other with sarcomatoid features of mesenchymal origin. The authors describe a case of cutaneous metastasis of sarcomatoid urothelial carcinoma in a 63-year-old male patient.


Subject(s)
Humans , Male , Middle Aged , Carcinoma, Transitional Cell/pathology , Carcinosarcoma/pathology , Skin Neoplasms/pathology , Urinary Bladder Neoplasms/pathology , Fatal Outcome , Neoplasm Invasiveness , Skin/pathology , Urothelium/pathology
6.
Int. j. cardiovasc. sci. (Impr.) ; 28(4)jul.-ago.2015. tab
Article in Portuguese | LILACS | ID: lil-776150

ABSTRACT

A doença cardiovascular é a principal causa de morte no mundo, e tem como principal fator de risco aidade avançada. O envelhecimento está associado a alterações morfoestruturais cardiovasculares que podem ser utilizadas como marcadores de risco de eventos cardíacos. Objetivo: Descrever os biomarcadores de uso rotineiro na ressonância magnética cardíaca (RMC) que melhor se correlacionam com o envelhecimento em uma população amostral e em um grupo de baixo risco cardiovascular, selecionados pela imagem. Métodos: Estudo descritivo e retrospectivo de exames de RMC realizados em um hospital e uma clínica particulares do município de Niterói, RJ, no período de maio de 2007 a abril de 2011. Foi realizada análise de biomarcadores clínicos e de imagem na população amostral e no grupo de baixo risco. Resultados: Indicadores clínicos: peso (r=0,09) e pressão arterial sistólica (r=0,21) apresentaram correlação positiva significativa com o envelhecimento (p=0,01 e <0,001, respectivamente). Indicadores de imagem: todos os diâmetros dosgrandes vasos tiveram correlação significativa com o envelhecimento (p<0,001). No entanto, na análise do grupo de baixo risco, os únicos marcadores com significativa correlação com a idade foram o diâmetro da aorta ascendente (r=0,52,p<0,001) e o comprimento maior do ventrículo direito (r=-0,31, p=0,03), sendo que este último é sempre inversamente significativo.Conclusões: Diversos biomarcadores da RMC podem ser utilizados para avaliação do envelhecimento, mas dentre osapresentados neste trabalho os diâmetros da aorta e do ventrículo direito são os que melhor se correlacionaram para uma população amostral ou de baixo risco cardiovascular...


Cardiovascular diseases are the leading cause of death worldwide. Their main risk factor is old age. Aging is associated with morphostructural cardiovascular abnormalities which may be used as risk markers of cardiac events. Objective: To describe biomarkers routinely used in cardiac magnetic resonance (MRI) that best correlate with aging in a sample population and in a group of low cardiovascular risk selected by the image.Methods: Descriptive and retrospective MRI study performed in a private hospital and in a private clinic in the city of Niterói, RJ, from May2007 to April 2011. Clinical biomarker and imaging analyses were performed on the sample population and in the low-risk group. Results: Clinical indicators: weight (r=0.09) and systolic blood pressure (r=0.21) showed a significant positive correlation with age(p=0.01 and <0.001, respectively). Imaging indicators: all diameters of the large vessels were significantly correlated with age (p<0.001).However, in the analysis of the low-risk group, the only markers with significant correlation with age was the ascending aorta diameter (r=0.52, p<0.001) and greater right ventricular length (r=-0, 31, p=0.03). The latter is always inversely significant. Conclusions: Several MRI biomarkers can be used for aging assessment, but among those presented in this paper, the diameter of the aorta and the right ventricle are the ones that best correlated for a sample or low cardiovascular risk population...


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Aged, 80 and over , Age Factors , Diagnostic Imaging , Cardiovascular Diseases/diagnosis , Aging/physiology , Magnetic Resonance Imaging/methods , Heart Rate , Heart Failure/complications , Heart Failure/diagnosis , Evidence-Based Medicine/methods , Retrospective Studies , Risk Factors , Sex Factors , Data Interpretation, Statistical , Heart Ventricles , Stroke Volume/physiology
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