Feasibility of Goal-Directed Fluid Therapy in Patients with Transcatheter Aortic Valve Replacement - An Ambispective Analysis

ABSTRACT Introduction: Goal-directed fluid therapy (GDFT) has been shown to reduce postoperative complications. The feasibility of GDFT in transcatheter aortic valve replacement (TAVR) patients under general anesthesia has not yet been demonstrated. We examined whether GDFT could be applied in patients undergoing TAVR in general anesthesia and its impact on outcomes. Methods: Forty consecutive TAVR patients in the prospective intervention group with GDFT were compared to 40 retrospective TAVR patients without GDFT. Inclusion criteria were age ≥ 18 years, elective TAVR in general anesthesia, no participation in another interventional study. Exclusion criteria were lack of ability to consent study participation, pregnant or nursing patients, emergency procedures, preinterventional decubitus, tissue and/or extremity ischemia, peripheral arterial occlusive disease grade IV, atrial fibrillation or other severe heart rhythm disorder, necessity of usage of intra-aortic balloon pump. Stroke volume and stroke volume variation were determined with uncalibrated pulse contour analysis and optimized according to a predefined algorithm using 250 ml of hydroxyethyl starch. Results: Stroke volume could be increased by applying GDFT. The intervention group received more colloids and fewer crystalloids than control group. Total volume replacement did not differ. The incidence of overall complications as well as intensive care unit and hospital length of stay were comparable between both groups. GDFT was associated with a reduced incidence of delirium. Duration of anesthesia was shorter in the intervention group. Duration of the interventional procedure did not differ. Conclusion: GDFT in the intervention group was associated with a reduced incidence of postinterventional delirium.

Extracorporeal Membrane Oxygenation Uses in Refractory Cardiogenic Shock After Open-Heart Surgery

ABSTRACT Introduction: Extracorporeal membrane oxygenation (ECMO) is the first-line therapy for temporary mechanical circulatory support allowing cardiac and pulmonary recovery or as a bridge to further therapeutic alternatives. The aim of this study was to report clinical outcomes in adult patients with refractory cardiac failure after open-heart surgery undergoing ECMO in a single center with an ECMO unit in Chile. Methods: We retrospectively analyzed adults with refractory cardiac failure after open-heart surgery who required a venoarterial (VA) ECMO between 2016 and 2021. Results: Of 16 patients with VA ECMO, 60% were men (n=10), 90% had hypertension (n=14), 69% had < 30% of left ventricular ejection fraction (n=11), and the mean European System for Cardiac Operative Risk Evaluation II score was 12 ± 11%. ECMO support with central cannulation accounts for 81% (n=13), and an intra-aortic balloon pump was used in nine patients (56%). The mean time of support was 4.7 ± 2.6 days (1.5 - 12 days). ECMO weaning was achieved in 88% of patients, and in-hospital mortality was 44% (n=7) after discharge. The freedom from all-cause mortality at one year of follow-up of the entire cohort was 38% (n=6). Conclusion: VA ECMO is now a well-known life-saving therapeutic option, but mortality and morbidity remain high. Implementation of an ECMO program with educational training is mandatory in order to find the proper balance between patient benefits, ethical considerations, and public health financial input in South America.

Caracterización clínica de insuficiencia cardiaca en pacientes internados en el Instituto Nacional de Cardiología, Paraguay

Introducción: la insuficiencia cardiaca es una de las enfermedades cardiovasculares más prevalentes en la población general y el estadio obligatorio de todas las patologías cardiovasculares, la cual irá en aumento a medida que crezca la expectativa de vida de la población. Objetivo: determinar las características de pacientes con insuficiencia cardiaca internados en el Instituto Nacional de Cardiología de Paraguay, durante un periodo de tres meses del año 2020. Metodología: estudio descriptivo de una muestra de 140 pacientes con diagnóstico de insuficiencia cardiaca. Los criterios para establecer este diagnóstico fueron clínicos y/o ecocardiográficos. Resultados: la media de edad fue 66 años, 57% del sexo masculino. El 88% de los pacientes presentaron hipertensión arterial. La etiología más frecuente fue la isquémica (26%), la mayoría consultó en clase funcional III y presentó fracción de eyección reducida, calculándose una prevalencia institucional 7,2%. Conclusión: el perfil del paciente con diagnóstico de insuficiencia cardiaca que consulta en este servicio es de un hombre de aproximadamente 66 años en clase funcional III, con fracción de eyección reducida y de etiología isquémica, cuyas patologías de base son hipertensión arterial y diabetes mellitus.

Introduction: Heart failure is one of the most prevalent cardiovascular diseases in the general population and the mandatory stage of all cardiovascular pathologies, which will increase as the life expectancy of the population grows. Objective: To determine the characteristics of patients with heart failure hospitalized at the National Institute of Cardiology of Paraguay, during a period of three months of the year 2020. Methodology: Descriptive study of a sample of 140 patients diagnosed with heart failure. The criteria to establish this diagnosis were clinical and/or echocardiographic. Results: The average age was 66 years, 57% male, and 88% of the patients had arterial hypertension. The most frequent etiology was ischemic (26%), the majority consulted in functional class III and presented reduced ejection fraction, calculating an institutional prevalence of 7.2%. Conclusion: The profile of the patient with a diagnosis of heart failure who consults in this service is that of a man of approximately 66 years old, in functional class III, with reduced ejection fraction and ischemic etiology, whose underlying pathologies are arterial hypertension and diabetes mellitus.

Insuficiencia cardiaca con fracción de eyección reducida: interrogantes comunes en la práctica médica

Introducción: la insuficiencia cardíaca es un síndrome clínico complejo con síntomas y signos que resultan de cualquier alteración estructural o funcional del llenado ventricular o la eyección de sangre. La prevalencia de insuficiencia cardiaca exhibe una variabilidad de 0,2% a 17,7% en naciones industrializadas Materiales y métodos: se realizó una revisión utilizando base de datos como: PubMed, Scopus, Embase, Cochrane Library, Scielo, incluyendo estudios de tipo observacionales, artículos de revisión, ensayos clínicos, y guías clínicas sobre el manejo de pacientes con insuficiencia cardiaca con fracción de eyección reducida. Resultados y conclusiones: la terapia en la insuficiencia cardíaca con fracción de eyección ventricular izquierda (FEVI) reducida busca contrarrestar los mecanismos deletéreos contrarreguladores. La disfunción sistólica del ventrículo izquierdo implica una FEVI ≤ 40%, mientras que la insuficiencia cardíaca se diagnostica por síntomas y signos de congestión, no solo por la FEVI. Los péptidos natriuréticos ayudan en el diagnóstico, pero niveles elevados pueden tener causas no cardíacas. La hipotensión arterial no contraindica el inicio del tratamiento farmacológico. La lesión renal aguda en estos pacientes indica un mal pronóstico, pero los diuréticos de asa de Henle pueden mejorar la función renal. Durante exacerbaciones agudas por insuficiencia cardiaca, no se deben suspender los medicamentos recomendados, ya que su continuidad reduce la mortalidad y las readmisiones. Terapias como la ivabradina, digoxina, hidralazina e isosorbida dinitrato no han demostrado beneficios en insuficiencia cardiaca y FEVI reducida. Sin embargo, vericiguat y omecamtiv mecarbil obtuvieron resultados significativos en reducción de muertes y hospitalizaciones por IC. Además, se recomienda el desfibrilador automático implantable para prevenir muerte cardíaca súbita. El uso de soporte mecánico circulatorio y el trasplante cardiaco debe ser considera en pacientes con IC avanzada que no responde adecuadamente al tratamiento farmacológico.

Introduction: Heart failure is a complex clinical syndrome with symptoms and signs resulting from any structural or functional alteration of ventricular filling or blood ejection. The prevalence of heart failure varies from 0.2% to 17.7% in industrialized nations. Materials and methods: A review was carried out using databases such as: PubMed, Scopus, Embase, Cochrane Library, Scielo, including observational studies, review articles, clinical trials, and clinical guidelines on the management of patients with heart failure with reduced ejection fraction. Results and conclusions: Therapy in heart failure with reduced left ventricular ejection fraction (LVEF) seeks to counteract deleterious counterregulatory mechanisms. Left ventricular systolic dysfunction implies an LVEF ≤ 40%, while heart failure is diagnosed by symptoms and signs of congestion, not LVEF alone. Natriuretic peptides aid in diagnosis, but elevated levels may have non-cardiac causes. Arterial hypotension does not contraindicate the start of pharmacological treatment. Acute kidney injury in these patients indicates a poor prognosis, but Henle loop diuretics may improve renal function. During acute exacerbations of heart failure, recommended medications should not be discontinued, because they reduce mortality and readmissions. Therapies such as ivabradine, digoxin, hydralazine, and isosorbide dinitrate have not demonstrated benefits in heart failure and reduced LVEF. However, vericiguat and omecamtiv mecarbil obtained significant results in reducing deaths and hospitalizations due to HF. Additionally, implantable cardioverter-defibrillator is recommended to prevent sudden cardiac death. The use of mechanical circulatory support and cardiac transplantation should be considered in patients with advanced HF that does not respond adequately to pharmacological treatment.

O Escore de Selvester QRS é um Preditor de Mortalidade na Insuficiência Cardíaca com Fração de Ejeção Preservada / Selvester QRS Score is a Predictor of Mortality in Heart Failure with Preserved Ejection Fraction

Resumo Fundamento O escore Selvester QRS (S-QRS) em um eletrocardiograma (ECG) de 12 derivações está associado tanto à quantidade de cicatriz miocárdica quanto ao mau prognóstico em pacientes com infarto do miocárdio. Entretanto, seu valor prognóstico na insuficiência cardíaca (IC) com fração de ejeção preservada (ICFEp) é desconhecido. Objetivo Este estudo tem como objetivo investigar o valor preditivo do escore S-QRS para mortalidade na ICFEp. Métodos 359 pacientes foram incluídos retrospectivamente neste estudo. As características eletrocardiográficas, ecocardiográficas e laboratoriais dos pacientes foram registradas. O escore S-QRS simplificado foi medido e registrado. O tempo médio de seguimento dos pacientes foi de 38,1±9,5 meses. A significância estatística foi estabelecida em p < 0,05. Resultados Dos 359 pacientes, 270 estavam no grupo sobrevivente e 89 no grupo falecido. Idade, PCR-us, troponina, pro-BNP, diâmetro do átrio esquerdo (AE), índice de volume do AE, duração do QRS, Tpe e escore do S-QRS foram estatisticamente altos no grupo falecido. Na análise de regressão logística multivariada, idade, PCR-us, NT-proBNP, diâmetro do AE, índice de volume do AE, Tpe e escore S-QRS mostraram-se fatores de risco independentes para mortalidade. Na análise da característica operacional do receptor (ROC), o valor de corte do escore S-QRS foi de 5,5, a sensibilidade foi de 80,8% e a especificidade foi de 77,2% (AUC: 0,880, p:0,00). Na análise de Kaplan-Meier, verificou-se que a mortalidade foi maior no grupo com escore S-QRS ≥ 5,5 do que no grupo com escore S-QRS < 5,5. (Long-rank, p:0,00) Conclusão Acreditamos que o escore S-QRS pode ser usado como um indicador prognóstico de mortalidade a longo prazo em pacientes com ICFEp.

Abstract Background The Selvester QRS (S-QRS) score on a 12-lead electrocardiogram (ECG) is associated with both the amount of myocardial scar and poor prognosis in myocardial infarction patients. However, its prognostic value in heart failure (HF) with preserved ejection fraction (HFpEF) is unknown. Objective This study aims to investigate the predictive value of the S-QRS score for mortality in HFpEF. Methods 359 patients were retrospectively enrolled in this study. Electrocardiographic, echocardiographic, and laboratory features of the patients were recorded. The simplified S-QRS score was measured and recorded. The mean follow-up time of the patients was 38.1±9.5 months. Statistical significance was set at p < 0.05. Results Of 359 patients, 270 were in the survivor group, and 89 were in the deceased group. Age, Hs-CRP, troponin, pro-BNP, left atrial (LA) diameter, LA volume index, QRS duration, Tpe, and S-QRS score were statistically high in the deceased group. In multivariate logistic regression analysis, age, Hs-CRP, NT-proBNP, LA diameter, LA volume index, Tpe, and S-QRS score were shown to be independent risk factors for mortality. In the receiver-operating characteristic (ROC) analysis, the cut-off value of the S-QRS score was 5.5, the sensitivity was 80.8%, and the specificity was 77.2% (AUC:0.880, p:0.00). In Kaplan-Meier analysis, it was found that mortality was higher in the group with S-QRS score ≥ 5.5 than in the group with S-QRS score < 5.5. (Long-rank, p:0.00) Conclusions We think that the S-QRS score can be used as a prognostic indicator of long-term mortality in patients with HFpEF.

Comparison of Single-Dose Cardioplegia in Valvular Heart Surgery: Lactated Ringer's-Based del Nido vs. Histidine-Tryptophan-Ketoglutarate Cardioplegia Solution

ABSTRACT Introduction: This study evaluated myocardial protection and clinical outcomes when using lactated Ringer's solution as the base solution for del Nido cardioplegia compared with histidine-tryptophan-ketoglutarate (HTK) solution in valvular surgery. Methods: From January 2017 to May 2018, 71 adult patients who underwent valvular surgery with del Nido cardioplegia (n=37) or HTK cardioplegia (n=34) were retrospectively analyzed. Results: Patients' characteristics were comparable between groups. Postoperative peak troponin T levels were similar. The del Nido group had a decreased incidence of ventricular fibrillation after aortic cross-clamp removal (13.51 vs. 55.88%; P<0.001), lower total volume of cardioplegia administered (1,000 [1,000, 1,250] vs. 1,800 [1,500, 2,000] mL; P<0.001), shorter hospital stay (6 [5, 8] vs. 7 [6, 10] days; P=0.03), and less postoperative red cell transfusion (34.29 vs. 61.11%; P=0.024). There is no difference in aortic cross-clamping time, postoperative change in left ventricular ejection fraction, intensive care unit stay, duration of inotropic support, new onset of atrial fibrillation, in-hospital mortality, complications, and three-year overall survival rate. Conclusion: Lactated Ringer's-based del Nido cardioplegia can be safely used for valvular surgery with acceptable clinical outcomes compared to HTK cardioplegia.

Agreement analysis of stroke volume and cardiac output measurement between a oscillometric device and transthoracic echocardiogram in normotensive individuals: a preliminary report

Abstract Introduction The evaluation of stroke volume (SV) is useful in research and patient care. To accomplish this, an ideal device should be noninvasive, continuous, reliable, and reproducible. The Mobil-O-Graph (MOG) is a noninvasive oscillometric matrix validated for measuring aortic and peripheral blood pressure, which through conversion algorithms can estimate hemodynamic parameters. Objectives To compare the MOG measurement of stroke volume, cardiac output, and cardiac index with the transthoracic echocardiogram (TTE). Methods Healthy volunteers aged 18 years or older were included. Two-dimensional TTEs were performed by a single operator. Subsequently, the measurement of noninvasive hemodynamics with MOG was performed with the operator blind to the results of the echocardiogram. Correlation analyses between stroke volume, cardiac output, and cardiac index parameters were performed. The degree of agreement between the methods was verified using the Bland-Altman method. Results A total of 38 volunteers were enrolled with a mean age of 27.6 ± 3.8 years; 21 (55%) were male The SV by TTE was 76.8 ± 19.5 mL and 75.7 ± 19.3 mL by MOG, Rho = 0.726, p< 0.0001. The CO by TTE was 5.04 ± 0.8 mL.min-1 and 5.1 ± 0.8 mL.min-1 by MOG Rho = 0.510, p= 0.001. Bland-Altman plots showed a good concordance between the two techniques. Conclusions Our study shows that the measurement of SV and CO by noninvasive hemodynamics with the MOG device offers a good concordance with the TTE with very few values beyond the confidence limits.

Sobrevida em 10 Anos de Pacientes com Insuficiência Cardíaca com FEVE 40-59%: Uma Classificação Fenotípica Viável? / Ten-Year Survival of Heart Failure Patients with Left Ventricular Ejection Fraction of 40-59%: A Potential Phenotypic Classification?

Resumo Os limites da fração de ejeção do ventrículo esquerdo (FEVE) para a insuficiência cardíaca (IC) com FEVE levemente reduzida (ICFElr) têm sido questionados, já que evidências demonstram que alguns medicamentos utilizados para IC com FEVE <40% (ICFEr) demonstram eficácia também em populações com FEVE < 60%. Objetivo do estudo foi comparar a sobrevida total e cardiovascular de pacientes com IC com FEVE 40-59% com paciente com ICFEr e IC com FEVE ≥ 60%. Foram incluídos pacientes com IC descompensada que preencheram os critérios diagnósticos de Framingham na admissão hospitalar entre 2009 e 2011. Os pacientes foram divididos em ICFEr, IC com FEVE 40-59% e IC com FEVE ≥ 60%. O método de Kaplan-Meier foi usado para detectar a sobrevida geral e cardiovascular em 10 anos. A significância estatística foi estabelecida em p <0,05. Foram incluídos 400 pacientes, com idade média de 69 ± 14 anos. A sobrevida cardiovascular nos pacientes com IC e FEVE 40-59% não foi diferente em comparação aos pacientes com ICFEr [Hazard Ratio (HR) ajustado 0,86 - Intervalo de Confiança (IC) 95% 0,61-1,22; Ptrend = NS], mas foi estatisticamente diferente em comparação aos com FEVE ≥ 60% (HR ajustado = 0,64 - IC95% 0,44-0,94; Ptrend = 0,023). Não houve diferença na taxa de sobrevida de 10 anos entre diferentes grupos de FEVE. O grupo de pacientes com IC e FEVE ≥ 60% teve maior sobrevida cardiovascular que os outros grupos.

Abstract Definitions of left ventricular ejection fraction (LVEF) cut-off values for HF with mildly reduced LVEF (HFmrEF) have been a subject of debate, in the face of evidence that some drugs used in the treatment of HF with LFEV < 40% (HFrEF) are also effective in patients with LVEF < 60%. The aim of this study was to compare overall survival and cardiovascular survival in HF patients with LVEF of 40-59% in patients with HFrEF and HF with LVEF ≥ 60%. Patients with decompensated HF who met the Framingham diagnostic criteria at hospital admission between 2009 and 2011 were included. Patients were divided into HFrEF, HF with LVEF 40-59%, and HF with LVEF ≥ 60%. The Kaplan-Meier was used to determine ten-year overall survival and cardiovascular survival. The statistical significance was established at p<0.05. A total of 400 patients were included, with a mean age of 69 ± 14 years. Cardiovascular survival in patients with HF and LVEF of 40-59% was not significantly different than in patients with HFrEF (adjusted Hazard Ratio [HR] 0.86; 95% Confidence Interval [CI] 0.61-1.22, Ptrend = NS), but was statistically different compared with patients with LVEF ≥ 60% (adjusted HR of 0.64; 95% CI 0.44-0.94, Ptrend = 0.023). No difference was found in 10-year survival between the LVEF groups. Patients with HF and LVEF ≥ 60% had significantly higher cardiovascular survival compared with the other groups.

Impacts of SVV-guided goal-directed fluid therapy on intraoperative signs, intestinal barrier function and prognosis in patients undergoing laparoscopic radical rectal cancer surgery / 中国医师杂志

Objective:To investigate the impacts of stroke volume variation (SVV)-guided goal-directed fluid therapy on intraoperative signs, intestinal barrier function and prognosis in patients undergoing laparoscopic radical rectal cancer surgery.Methods:A total of 90 patients who underwent laparoscopic radical resection for rectal cancer in Peking University International Hospital from May 2020 to May 2022 were prospectively selected as subjects, and divided into SVV group (45 cases) and traditional infusion group (45 cases) by random number table method. The SVV group was given SVV-guided goal-directed fluid therapy, and the traditional infusion group was given central venous pressure (CVP)-guided goal-directed fluid therapy. The operation-related indicators (urine volume, crystalloid volume, colloid volume, total fluid volume, blood loss and operation time), intraoperative signs indicators[heart rate (HR), CVP, mean arterial pressure (MAP)], intestinal barrier function indicators [diamine oxidase (DAO), D-lactic acid], inflammatory factor levels [interleukin-10 (IL-10), interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α)], and the incidence of complications were compared between the two groups.Results:There was no significant difference in the urine volume, blood loss and operation time between the two groups (all P>0.05), while the crystalloid volume, colloid volume and total fluid volume in the SVV group were greatly lower than those in the traditional infusion group (all P<0.05). There was no significant difference in HR between the two groups at different time points ( P>0.05). Compared with T 0, CVP at T 1 in the two groups was significantly decreased (all P<0.05), and increased at T 2 and T 3 compared with T 1 (all P<0.05). There was no significant difference in MAP at different time points in the SVV group (all P>0.05). The MAP at T 1, T 2 and T 3 in the traditional infusion group was significantly lower than that at T 0 (all P<0.05), and the MAP at T 1, T 2 and T 3 in the SVV group was significantly higher than that in the traditional infusion group (all P<0.05). Compared with T 0, DAO and D-lactic acid levels were significantly increased at T 1, T 3, T 4 and T 5 in the two groups (all P<0.05), and DAO and D-lactic acid levels at T 1, T 3, T 4 and T 5 in the SVV group were significantly lower than those in the traditional infusion group (all P<0.05). Compared with T 0, serum IL-10 level in the two groups was significantly decreased at T 4 ( P<0.05), and serum IL-6 and TNF-α levels were significantly increased at T 4 (all P<0.05). The serum levels of IL-10, IL-6 and TNF-α in the SVV group at T 4 were significantly different from those in the traditional infusion group (all P<0.05). Compared with T 4, the serum levels of IL-10 at T 5 were significantly increased (all P<0.05), while the levels of IL-6 and TNF-α were significantly decreased (all P<0.05), but there was no statistical significance between the two groups (all P>0.05). The incidence of postoperative infection, anastomotic fistula, vomiting and nausea in SVV group (13.33%) was significantly lower than that in traditional infusion group (35.33%) ( P<0.05). Conclusions:SVV-guided goal-directed fluid therapy for patients undergoing laparoscopic radical rectal cancer can effectively stabilize intraoperative vital signs, reduce inflammation, improve intestinal barrier function, and improve prognosis.

Effect of stroke volume variation goal-directed fluid therapy on postoperative pulmonary complications after pediatric living donor liver transplantation / 中华麻醉学杂志

Objective:To evaluate the effect of stroke volume variation(SVV) goal-directed fluid therapy on postoperative pulmonary complications(PPCs) after pediatric living donor liver transplantation.Methods:One hundred and twenty pediatric patients undergoing pediatric living-donor liver transplantation(all diagnosed with congenital biliary atresia) were divided into 2 groups( n=60 each) using the random number table method: control group and SVV group. Intraoperative fluid management was guided by central venous pressure and mean arterial pressure in control group, while by SVV combined with cardiac output in SVV group. Intraoperative circulation, fluid intake and usage of vasoactive drug were recorded. Central venous blood samples were collected to determine the concentrations of serum Clara cell 16 kDa protein, interleukin-6, and tumor necrosis factor-alpha before anesthesia(T 0), at the end of anhepatic phase(T 1), at 3 h of neohepatic phase(T 2), at the end of surgery(T 3) and at 24 h after operation(T 4). Pulmonary ultrasonography was performed before surgery, at the end of surgery and at 1, 3 and 7 days after surgery. The pediatric patients were followed up for 1 week after surgery to record the PPCs, including acute lung injury, pulmonary infection, pulmonary atelectasis, pleural effusion and acute respiratory distress syndrome. Results:Compared with control group, the incidence of PPCs, acute lung injury and pulmonary infection was significantly decreased, the pulmonary ultrasound score was decreased at the end of surgery and at 1, 3 and 7 days after surgery, the usage of intraoperative dobutamine was increased, the duration of postreperfusion syndrome was shortened, the fluid intake and epinephrine usage were reduced, and the serum Clara cell 16 kDa protein, tumor necrosis factor-alpha and interleukin-6 concentrations were decreased at T 1-T 4 in SVV group( P<0.05). Conclusions:SVV goal-directed fluid management can reduce the development of PPCs in pediatric living donor liver transplantation.

Intervention effect of transcutaneous auricular vagus nerve stimulation on myocardial structural remodeling, electrical remodeling and apoptosis in rat heart failure model with preserved ejection fraction / 中华老年医学杂志

Objective:To observe the effect of percutaneous auricular vagus nerve stimulation on myocardial structural remodeling, electrical remodeling and apoptosis in rats of heart failure with preserved ejection fraction, and to explore the relationship between this effect and oxidative stress.Methods:The arteriovenous fistula was closed by ligation two weeks after establishment in SD rat.By increasing cardiac volume load in the short term, a rat model of heart failure with preserved ejection fraction was constructed.Forty rats were randomly divided into four groups, with 10 rats in each group: sham operation group(S), abdominal aorta-inferior vena cava fistula + closure group(AVF+ L), abdominal aorta-inferior vena cava fistula + closure+ percutaneous auricular vagus nerve stimulation group(AVF+ L+ tVNS)and abdominal aorta-inferior vena cava fistula + closure+ percutaneous auricular vagus nerve stimulation + acetylcholine M 2 receptor antagonist group(AVF+ L+ tVNS+ M -). Rats in the AVF+ L+ tVNS group received percutaneous vagal nerve stimulation on the basis of those in the AVF+ L group.Rats in the AVF+ L+ tVNS+ M - group received daily injection of acetylcholine M 2 receptor antagonist mesotramine(0.5mg/Kg)into tail vein on the basis of those in the AVF+ L+ tVNS group.The parameters of cardiac structural remodeling and electrical remodeling in each group were obtained by cardiac ultrasound and cardiac electrophysiological stimulator.Enzyme-linked immunosorbent assay(ELISA)was used to detect the values of B-type natriuretic peptide precursor(NT-proBNP)and oxidative stress-related indicators in each group.hematoxylin-eosin(HE)staining was used to observe the damage of myocardial structure, disorder of cell arrangement and infiltration of inflammatory cells.Cardiomyocyte apoptosis was observed by TdT-mediated dUTP nick end labeling(TUNEL)staining and apoptosis index was calculated.reverse transcription-polymerase chain reaction(RT-PCR)and Western blotting were used to detect the mRNA and protein expression of B cell lymphoma / leukemia-2(BCL-2)and apoptosis promoting gene(BAX)in BCL-2 gene family. Results:The rats in the AVF + L group developed heart failure characterized by ventricular wall hypertrophy and diastolic dysfunction, and the left ventricular ejection fraction(LVEF)was >50 %.The rat heart failure model with preserved ejection fraction was successfully established.HE staining showed that the myocardial tissue structure damage, cell arrangement disorder and inflammatory cell infiltration were obvious in AVF+ L group, while the pathological changes of myocardial tissue in AVF+ L+ tVNs were significantly less than those in AVF+ L group.Compared with AVF+ L group, in the AVF+ L+ tVNs, the value of NT-proBNP decreased[(301.25 ± 16.07)ng/L vs.(79.33±5.63)ng/L, P<0.05], the value of E/A increased(1.28 ± 0.06 vs.1.66 ±0.05, P<0.05), the expression of BCL-2 mRNA[0.08(0.07, 0.08) vs.0.70(0.64, 0.76), P<0.05]and BCL-2 protein(0.19±0.03 vs.0.46±0.04, P<0.05)both increased, the expression of BAX mRNA(5.00±0.32 vs.2.14±0.36, P<0.05)and BAX protein(0.76±0.04 vs.0.43±0.05, P<0.05)both decreased, while the apoptotic index was also decreased(16.26±0.32 vs.7.04±0.24, P<0.05). Compared with AVF + L group, the indexes of myocardial structural remodeling, electrical remodeling and oxidative stress were decreased in AVF + L + tVNs group(P<0.05). Compared with AVF + L group, there was no significant difference in the above indexes in AVF + L + tVNS + M - group( P>0.05). Conclusions:tVNS can alleviate myocardial structural remodeling, electrical remodeling and apoptosis in HFpEF rats, which may be related to the reduction of oxidative stress response activity.

Research progress on the role and mechanisms of action of sodium-dependent glucose transporter 2 inhibitors in heart failure with preserved ejection fraction / 中华老年医学杂志

Sodium-dependent glucose transporter 2 inhibitors(SGLT2i)are a new class of glucose-lowering drugs, can reduce blood sugar by inhibiting the reabsorption of glucose at the proximal tubule and are widely used in clinical treatment of type 2 diabetes.SGLT2i can not only lower blood sugar, but also offer multiple cardiovascular benefits.Several large randomized controlled trials have confirmed the safety and efficacy of SGLT2i for heart failure with preserved ejection fraction(HFpEF). Herein, we present an overview on advances in SGLT2i for HFpEF.

The clinical impact of the systolic volume variation guided intraoperative fluid administration regimen on surgical outcomes after pancreaticoduodenectomy: a retrospective cohort study

Abstract Background Pancreaticoduodenectomy is associated with high morbidity. Many preoperative variables are risk factors for postoperative complications, but they are primarily non-modifiable. It is not clear whether an intraoperative goal-directed fluid regimen might be associated with fewer postoperative surgical complications compared to current conservative, non-goal-directed fluid practices. We hypothesize that the use of Systolic Volume Variation (SVV)-guided intraoperative fluid administration might be beneficial. Methods Data from 223 patients who underwent pancreaticoduodenectomy in our institution between 2015 and 2019 were reviewed. Patients were classified into two groups based on the use of intraoperative use of SVV to guide the administration of fluids. The decision to use SVV or not was made by the attending anesthesiologist. Subjects were classified into SVV-guided intraoperative fluid therapy (SVV group) and non-SVV-guided intraoperative fluid therapy (non-SVV group). Uni and multivariate regression analyses were conducted to determine if SVV-guided fluid therapy was significantly associated with a lower incidence of postoperative surgical complications, such as Postoperative Pancreatic Fistula (POPF), Delayed Gastric Emptying (DGE), among others, after adjusting for confounders. Results Baseline, demographic, and intraoperative characteristics were similar between SVV and non-SVV groups. In the multivariate analysis, the use of SVV guidance was significantly associated with fewer postoperative surgical complications (OR = 0.48; 95% CI 0.25-0.91; p= 0.025), even after adjusting for significant covariates, such as perioperative use of epidural, pancreatic gland parenchyma texture, and diameter of the pancreatic duct. Conclusions VV-guided intraoperative fluid administration might be associated with fewer postoperative surgical complications after pancreaticoduodenectomy.

Acometimento do Ventrículo Direito na Cardiomiopatia por Depósito de Glicogênio (PRKAG2): Análise Ecocardiográfica Convencional e Avançada / Right Ventricle Involvement by Glycogen Storage Cardiomyopathy (PRKAG2): Standard and Advanced Echocardiography Analyses

Resumo Fundamento A síndrome do PRKAG2 é uma doença hereditária autossômica dominante rara, de início precoce. Objetivamos descrever os achados ecocardiográficos do ventrículo direito (VD) usando modalidades bi e tridimensionais (2D e 3D), incluindo índices de deformação miocárdica nesta cardiomiopatia. Também objetivamos demonstrar se esta técnica poderia identificar alterações na função do VD que pudessem distinguir quaisquer achados particulares. Métodos Trinta pacientes com síndrome do PRKAG2 (R302Q e H401Q) geneticamente comprovada, 16 (53,3%) do sexo masculino, com idade média de 39,1 ± 15,4 anos, foram submetidos a exame ecocardiográfico completo. A visão de 4 câmaras com foco no VD foi adquirida para medições 2D e 3D. Os testes t de Student ou Wilcoxon-Mann-Whitney foram usados para comparar as variáveis numéricas entre 2 grupos, e p < 0,05 foi considerado significativo. Resultados Doze pacientes (40%) tiveram marca-passo implantado por 12,4 ± 9,9 anos. A espessura diastólica média da parede livre do VD foi de 7,9 ± 2,9 mm. O strain longitudinal de 4 câmaras do VD (SL4VD), incluindo a parede livre e o septo interventricular, foi de -17,3% ± 6,7%, e o strain longitudinal da parede livre do VD (SLPLVD) foi de −19,1% ± 8,5%. A razão apical do SLPLVD mediu 0,63 ± 0,15. A fração de ejeção (FE) 3D média do VD foi de 42,6% ± 10,9% e abaixo dos limites normais em 56,7% dos pacientes. Correlação positiva ocorreu entre FE 3D do VD, SL4VD e SLPLVD, principalmente para pacientes sem marca-passo (p = 0,006). Conclusão O envolvimento do VD em PRKAG2 é frequente e ocorre em diferentes graus. A ecocardiografia é uma ferramenta valiosa na detecção de anormalidades miocárdicas do VD nesta condição. O uso de SL4VD 2D, SLPLVD e FE 3D oferecem indicadores confiáveis de disfunção sistólica do VD nesta cardiomiopatia rara e desafiadora.

Abstract Background PRKAG2 syndrome is a rare, early-onset autosomal dominant inherited disease. We aimed to describe the right ventricle (RV) echocardiographic findings using two and three-dimensional (2D and 3D) modalities including myocardial deformation indices in this cardiomyopathy. We also aimed to demonstrate whether this technique could identify changes in RV function that could distinguish any particular findings. Methods Thirty patients with genetically proven PRKAG2 (R302Q and H401Q), 16 (53.3%) males, mean age 39.1 ± 15.4 years, underwent complete echocardiography examination. RV-focused, 4-chamber view was acquired for 2D and 3D measurements. Student's t or Wilcoxon-Mann-Whitney tests were used to compare numerical variables between 2 groups, and p < 0.05 was considered significant. Results Twelve patients (40%) had a pacemaker implanted for 12.4 ± 9.9 years. RV free wall mean diastolic thickness was 7.9 ± 2.9 mm. RV 4-chamber longitudinal strain (RV4LS), including the free wall and interventricular septum, was -17.3% ± 6.7%, and RV free wall longitudinal strain (RVFWLS) was −19.1% ± 8.5%. The RVFWLS apical ratio measured 0.63 ± 0.15. Mean RV 3D ejection fraction (EF) was 42.6% ± 10.9% and below normal limits in 56.7% of patients. Positive correlation occurred between RV 3DEF, RV4LS, and RVFWLS, especially for patients without a pacemaker (p = 0.006). Conclusion RV involvement in PRKAG2 syndrome is frequent, occurring in different degrees. Echocardiography is a valuable tool in detecting RV myocardial abnormalities in this condition. The use of 2D RV4LS, RVFWLS, and 3DEF offers reliable indicators of RV systolic dysfunction in this rare, challenging cardiomyopathy.