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Early diagnosis is essential for the appropriate management of acute kidney injury (AKI). We evaluated the impact of an electronic AKI alert together with a care bundle on the progression and mortality of AKI. This was a single-center prospective study that included AKI patients aged ≥ 18 years, whereas those in palliative care, nephrology, and transplantation departments were excluded. An AKI alert was issued in electronic medical records and a care bundle was suggested. A series of classes were administered to the multidisciplinary teams by nephrologists, and a clinical pharmacist audited prescriptions. Patients were categorized into pre-alert and post-alert groups. The baseline characteristics were comparable between the pre-alert (n = 1613) and post-alert (n = 1561) groups. The 30-day mortality rate was 33.6% in the entire cohort and was lower in the post-alert group (30.5% vs. 36.7%; p < 0.001). Age, pulmonary disease, malignancy, and ICU admission were associated with an increase in 30-day mortality. The electronic AKI alert together with a care bundle and a multidisciplinary education program was associated with a reduction in 30-day mortality in patients with AKI.

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RESUMO Objetivo: Caracterizar a lesão miocárdica e as complicações cardiovasculares e seus preditores em pacientes graves e críticos com COVID-19 admitidos à unidade de terapia intensiva. Métodos: Este foi um estudo de coorte observacional em pacientes graves e críticos com COVID-19 admitidos à unidade de terapia intensiva. A lesão miocárdica foi definida como níveis sanguíneos de troponina cardíaca acima do limite de referência superior ao percentil 99. Os eventos cardiovasculares considerados foram combinação de trombose venosa profunda, embolia pulmonar, acidente vascular cerebral, infarto do miocárdio, isquemia aguda de membros, isquemia mesentérica, insuficiência cardíaca e arritmia cardíaca. Regressão logística univariada e multivariada ou modelos de risco proporcional de Cox foram utilizados para determinar os preditores de lesão miocárdica. Resultados: Foram admitidos à unidade de terapia intensiva 567 pacientes graves e críticos com COVID-19, dos quais 273 (48,1%) apresentavam lesão miocárdica. Dos 374 pacientes críticos com COVID-19, 86,1% tinham lesão miocárdica, além de apresentarem mais disfunção orgânica e maior mortalidade aos 28 dias (56,6% versus 27,1%; p < 0,001). Foram preditores de lesão miocárdica idade avançada, hipertensão arterial e uso de imunomoduladores. Complicações cardiovasculares ocorreram em 19,9% dos pacientes graves e críticos com COVID-19 admitidos à unidade de terapia intensiva, e a maioria dos eventos deu-se em pacientes com lesão miocárdica (28,2% versus 12,2%; p < 0,001). A ocorrência de evento cardiovascular precoce durante internação em unidade de terapia intensiva estava associada à maior mortalidade aos 28 dias em comparação com eventos tardios ou inexistentes (57,1% versus 34,0% versus 41,8%; p = 0,01). Conclusão: Pacientes com formas graves e críticas de COVID-19 admitidos à unidade de terapia intensiva foram comumente diagnosticados com lesão miocárdica e complicações cardiovasculares, e ambas estavam associadas à maior mortalidade nesses pacientes.

ABSTRACT Objective: To characterize myocardial injury and cardiovascular complications and their predictors in severe and critical COVID-19 patients admitted to the intensive care unit. Methods: This was an observational cohort study of severe and critical COVID-19 patients admitted to the intensive care unit. Myocardial injury was defined as blood levels of cardiac troponin above the 99th percentile upper reference limit. Cardiovascular events considered were the composite of deep vein thrombosis, pulmonary embolism, stroke, myocardial infarction, acute limb ischemia, mesenteric ischemia, heart failure and arrhythmia. Univariate and multivariate logistic regression or Cox proportional hazard models were used to determine predictors of myocardial injury. Results: Of 567 patients with severe and critical COVID-19 admitted to the intensive care unit, 273 (48.1%) had myocardial injury. Of the 374 patients with critical COVID-19, 86.1% had myocardial injury, and also showed more organ dysfunction and higher 28-day mortality (56.6% versus 27.1%, p < 0.001). Advanced age, arterial hypertension and immune modulator use were predictors of myocardial injury. Cardiovascular complications occurred in 19.9% of patients with severe and critical COVID-19 admitted to the intensive care unit, with most events occurring in patients with myocardial injury (28.2% versus 12.2%, p < 0.001). The occurrence of an early cardiovascular event during intensive care unit stay was associated with higher 28-day mortality compared with late or no events (57.1% versus 34% versus 41.8%, p = 0.01). Conclusion: Myocardial injury and cardiovascular complications were commonly found in patients with severe and critical forms of COVID-19 admitted to the intensive care unit, and both were associated with increased mortality in these patients.

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INTRODUCTION: Cardiac surgery-associated acute kidney injury (CSA-AKI) is a powerful predictor of perioperative outcomes. We evaluated the burden of CSA-AKI in patients with preserved baseline renal function. METHODS: The data of 2,162 adult patients who underwent cardiac surgery from January 2005 to December 2020 were analyzed. Logistic regression models were used to determine predictors of CSA-AKI and their associations with hospital mortality up to 30 days. RESULTS: The prevalence of acute kidney injury was 43.0%, and 2.0% of patients required renal replacement therapy. Hospital mortality rate was 5.6% (non-acute kidney injury = 2.0% vs. CSA-AKI = 10.4%, P<0.001), and any degree of CSA-AKI was associated with a significant increase in death rates (stage 1 = 4.3%, stage 2 = 23.9%, stage 3 = 59.7%). Multivariable logistic regression analysis identified age, obesity, left ventricular dysfunction, previous cardiac surgery, and cardiopulmonary bypass duration as predictors of CSA-AKI. Moreover, CSA-AKI was confirmed as independent predictor of hospital mortality for stage 1 (odds ratio, 2.02; 95% confidence interval, 1.16 to 3.51; P=0.013), stage 2 (odds ratio, 9.18; 95% confidence interval, 4.54 to 18.58; P<0.001), and stage 3 (odds ratio, 37.72; 95% confidence interval, 18.87 to 75.40; P<0.001) patients. CONCLUSION: Age, obesity, left ventricular dysfunction, previous cardiac surgery, and cardiopulmonary bypass duration are independent predictors of CSA-AKI in patients with preserved baseline renal function. The development of CSA-AKI is significantly associated with worse outcomes, and there is a dose-response relationship between acute kidney injury stages and hospital mortality.

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This study aimed to evaluate the COVID-19 hospitalizations in a tertiary hospital by age group and month, considering the introduction and the advance of the vaccination against the disease. The laboratory-confirmed COVID-19-associated hospitalizations among people aged 20 years or older, that occurred between March 2020 and June 2021, were distributed by month of symptom onset and age group. The proportion of hospitalizations by age group was calculated for the year 2021. The proportions were compared using the chi-square test for trends. The marks of vaccination advances among different age groups were taken from the official website LocalizaSUS. In 2020, hospitalizations among people aged 60-80 years old were the most frequent (39.1%). From January-June 2021, when the vaccination commenced, while hospitalizations of patients aged 20 to < 40 and 40 to 60 years old showed an increasing trend, the older age groups and those with vaccination recommendations (from 60 to < 80 and from 80 or over) showed a downward trend. As of June 2021, with widespread vaccination, a drop in hospitalizations was observed in > 60 years old. At 20 to <40 and 40 to < 60, an increase in hospitalizations was observed. It demonstrates the important role of vaccination in combating the COVID-19 pandemic.

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ABSTRACT Introduction: Cardiac surgery-associated acute kidney injury (CSA-AKI) is a powerful predictor of perioperative outcomes. We evaluated the burden of CSA-AKI in patients with preserved baseline renal function. Methods: The data of 2,162 adult patients who underwent cardiac surgery from January 2005 to December 2020 were analyzed. Logistic regression models were used to determine predictors of CSA-AKI and their associations with hospital mortality up to 30 days. Results: The prevalence of acute kidney injury was 43.0%, and 2.0% of patients required renal replacement therapy. Hospital mortality rate was 5.6% (non-acute kidney injury = 2.0% vs. CSA-AKI = 10.4%, P<0.001), and any degree of CSA-AKI was associated with a significant increase in death rates (stage 1 = 4.3%, stage 2 = 23.9%, stage 3 = 59.7%). Multivariable logistic regression analysis identified age, obesity, left ventricular dysfunction, previous cardiac surgery, and cardiopulmonary bypass duration as predictors of CSA-AKI. Moreover, CSA-AKI was confirmed as independent predictor of hospital mortality for stage 1 (odds ratio, 2.02; 95% confidence interval, 1.16 to 3.51; P=0.013), stage 2 (odds ratio, 9.18; 95% confidence interval, 4.54 to 18.58; P<0.001), and stage 3 (odds ratio, 37.72; 95% confidence interval, 18.87 to 75.40; P<0.001) patients. Conclusion: Age, obesity, left ventricular dysfunction, previous cardiac surgery, and cardiopulmonary bypass duration are independent predictors of CSA-AKI in patients with preserved baseline renal function. The development of CSA-AKI is significantly associated with worse outcomes, and there is a dose-response relationship between acute kidney injury stages and hospital mortality.

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BACKGROUND: The impact of left ventricular reverse remodeling (LVRR) on the prognosis of Chagas cardiomyopathy is unknown. The aim of this study was to determine whether the presence of LVRR can predict mortality in these patients. METHODS: From January 2000 to December 2010, the medical charts of 159 patients were reviewed. LVRR was defined as an increase of left ventricular ejection fraction (LVEF) and a decrease of left ventricular end-diastolic diameter (LVDD) by two-dimensional echocardiography. No patient underwent cardiac resynchronization therapy or required mechanical ventricular assistance. RESULTS: At baseline, median (25th-75th) LVDD was 64 mm (59-70), and median LVEF was 33.2% (26.4-40.1). LVRR was detected in 24.5% of patients in a 40-month (26-64) median follow-up. In the LVRR group, LVDD decreased from 64 mm (59-68) to 60 mm (56-65; p < 0.001), and LVEF increased from 31.3% (24.1-39.0) to 42.5% (32.2-47.7; p < 0.001). However, LVRR was not associated with heart failure hospitalization, cardiogenic shock, heart transplantation, or mortality (p > 0.05 for all comparisons). The Cox proportional hazard model analysis identified only cardiogenic shock (hazard ratio [HR]: 2.41; 95% confidence interval [CI]: 1.51-3.85; p < 0.001) and serum sodium level (HR: 0.91; 95% CI: 0.86-0.96; p < 0.001) as independent predictors of all-cause mortality. CONCLUSIONS: Left ventricular reverse remodeling occurs in one quarter of patients with Chagas cardiomyopathy and have no impact on the outcomes of patients with this condition.

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OBJECTIVE: To characterize myocardial injury and cardiovascular complications and their predictors in severe and critical COVID-19 patients admitted to the intensive care unit. METHODS: This was an observational cohort study of severe and critical COVID-19 patients admitted to the intensive care unit. Myocardial injury was defined as blood levels of cardiac troponin above the 99th percentile upper reference limit. Cardiovascular events considered were the composite of deep vein thrombosis, pulmonary embolism, stroke, myocardial infarction, acute limb ischemia, mesenteric ischemia, heart failure and arrhythmia. Univariate and multivariate logistic regression or Cox proportional hazard models were used to determine predictors of myocardial injury. RESULTS: Of 567 patients with severe and critical COVID-19 admitted to the intensive care unit, 273 (48.1%) had myocardial injury. Of the 374 patients with critical COVID-19, 86.1% had myocardial injury, and also showed more organ dysfunction and higher 28-day mortality (56.6% versus 27.1%, p < 0.001). Advanced age, arterial hypertension and immune modulator use were predictors of myocardial injury. Cardiovascular complications occurred in 19.9% of patients with severe and critical COVID-19 admitted to the intensive care unit, with most events occurring in patients with myocardial injury (28.2% versus 12.2%, p < 0.001). The occurrence of an early cardiovascular event during intensive care unit stay was associated with higher 28-day mortality compared with late or no events (57.1% versus 34% versus 41.8%, p = 0.01). CONCLUSION: Myocardial injury and cardiovascular complications were commonly found in patients with severe and critical forms of COVID-19 admitted to the intensive care unit, and both were associated with increased mortality in these patients.

OBJETIVO: Caracterizar a lesão miocárdica e as complicações cardiovasculares e seus preditores em pacientes graves e críticos com COVID-19 admitidos à unidade de terapia intensiva. MÉTODOS: Este foi um estudo de coorte observacional em pacientes graves e críticos com COVID-19 admitidos à unidade de terapia intensiva. A lesão miocárdica foi definida como níveis sanguíneos de troponina cardíaca acima do limite de referência superior ao percentil 99. Os eventos cardiovasculares considerados foram combinação de trombose venosa profunda, embolia pulmonar, acidente vascular cerebral, infarto do miocárdio, isquemia aguda de membros, isquemia mesentérica, insuficiência cardíaca e arritmia cardíaca. Regressão logística univariada e multivariada ou modelos de risco proporcional de Cox foram utilizados para determinar os preditores de lesão miocárdica. RESULTADOS: Foram admitidos à unidade de terapia intensiva 567 pacientes graves e críticos com COVID-19, dos quais 273 (48,1%) apresentavam lesão miocárdica. Dos 374 pacientes críticos com COVID-19, 86,1% tinham lesão miocárdica, além de apresentarem mais disfunção orgânica e maior mortalidade aos 28 dias (56,6% versus 27,1%; p < 0,001). Foram preditores de lesão miocárdica idade avançada, hipertensão arterial e uso de imunomoduladores. Complicações cardiovasculares ocorreram em 19,9% dos pacientes graves e críticos com COVID-19 admitidos à unidade de terapia intensiva, e a maioria dos eventos deu-se em pacientes com lesão miocárdica (28,2% versus 12,2%; p < 0,001). A ocorrência de evento cardiovascular precoce durante internação em unidade de terapia intensiva estava associada à maior mortalidade aos 28 dias em comparação com eventos tardios ou inexistentes (57,1% versus 34,0% versus 41,8%; p = 0,01). CONCLUSÃO: Pacientes com formas graves e críticas de COVID-19 admitidos à unidade de terapia intensiva foram comumente diagnosticados com lesão miocárdica e complicações cardiovasculares, e ambas estavam associadas à maior mortalidade nesses pacientes.

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ABSTRACT This study aimed to evaluate the COVID-19 hospitalizations in a tertiary hospital by age group and month, considering the introduction and the advance of the vaccination against the disease. The laboratory-confirmed COVID-19-associated hospitalizations among people aged 20 years or older, that occurred between March 2020 and June 2021, were distributed by month of symptom onset and age group. The proportion of hospitalizations by age group was calculated for the year 2021. The proportions were compared using the chi-square test for trends. The marks of vaccination advances among different age groups were taken from the official website LocalizaSUS. In 2020, hospitalizations among people aged 60-80 years old were the most frequent (39.1%). From January-June 2021, when the vaccination commenced, while hospitalizations of patients aged 20 to < 40 and 40 to 60 years old showed an increasing trend, the older age groups and those with vaccination recommendations (from 60 to < 80 and from 80 or over) showed a downward trend. As of June 2021, with widespread vaccination, a drop in hospitalizations was observed in > 60 years old. At 20 to <40 and 40 to < 60, an increase in hospitalizations was observed. It demonstrates the important role of vaccination in combating the COVID-19 pandemic.

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AIMS: This study aimed to develop and validate a simple method for predicting long-term all-cause mortality in ambulatory patients with chronic heart failure (CHF) residing in an area where Chagas disease is endemic, which will be important not only for patients living in Latin America but also to those living in developed non-endemic countries. METHODS AND RESULTS: A total of 677 patients with a wide spectrum of aetiologies for left ventricular systolic dysfunction and receiving optimized evidence-based treatment for CHF were prospectively followed for approximately 11 years. We established a risk score using Cox proportional hazard regression models. After multivariable analysis, four variables were independently associated with mortality and included in the CALL Risk Score: Chagas cardiomyopathy aetiology alone [hazard ratio, 3.36; 95% confidence interval (CI), 2.61-4.33; P < 0.001], age ≥60 years (hazard ratio, 1.36; 95% CI, 1.06-1.74; P = 0.016), left anterior fascicular block (hazard ratio, 1.64; 95% CI, 1.27-2.11; P < 0.001), and left ventricular ejection fraction <40% (hazard ratio, 1.73; 95% CI, 1.30-2.28; P < 0.001). The internal validation considered the bootstrapping, a resampling technique recommended for prediction model development. Hence, we established a scoring system attributing weights according to each risk factor: 3 points for Chagas cardiomyopathy alone, 1 point for age ≥60 years, and 2 points each for left anterior fascicular block and left ventricular ejection fraction <40%. Three risk groups were identified: low risk (score ≤2 points), intermediate risk (score of 3 to 5 points), and high risk (score ≥6 points). High-risk patients had more than two-fold increase in mortality (26.9 events/100 patient-years) compared with intermediate-risk patients (10.1 events/100 patient-years) and almost seven-fold increase compared with low-risk patients (4.3 events/100 patient-years). The CALL Risk Score data sets from the development and internal validation cohorts both displayed suitable discrimination c-index of 0.689 (95% CI, 0.688-0.690; P < 0.001) and 0.687 (95% CI, 0.686-0.688; P < 0.001), respectively, and satisfactory calibration [Greenwood-Nam-D'Agostino test (8) = 7.867; P = 0.447] and [Greenwood-Nam-D'Agostino test (8) = 10.08; P = 0.273], respectively. CONCLUSIONS: The CALL Risk Score represents a simple and validated method with a limited number of non-invasive variables that successfully predicts long-term all-cause mortality in a real-world cohort of patients with CHF. Patients with CHF stratified as high risk according to the CALL Risk Score should be monitored and aggressively managed, including those with CHF secondary to Chagas disease.

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BACKGROUND: Few studies regarding chronic kidney disease (CKD) and anemia have been conducted in patients with Chagas cardiomyopathy (CC). We evaluated the risk prediction performance of the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation and anemia in CC patients. METHODS: From 2000 to 2010, a total of 232 patients were studied in a single-center retrospective study. CKD was defined as creatinine clearance <60 mL/min/1.73 m2 according to CKD-EPI equation. Anemia was defined as hemoglobin <12 g/dL (women) and <13 g/dL (men). Cox proportional hazards models were used to establish predictors for death. RESULTS: At baseline, 98 individuals (42.2%) had criteria for CKD and 41 (17.7%) for anemia. During follow-up, 136 patients (58.6%) died. Independently, CKD and anemia were not associated with all-cause mortality. However, when they coexisted, an additional risk was attributed for these patients. Cox proportional hazard models analysis identified systolic blood pressure (hazard ratio, 0.99; 95% confidence interval (CI), 0.98 to 1.00; P=0.015), implantable cardioverter-defibrillator (hazard ratio, 0.48; 95% CI, 0.27 to 0.85; P=0.012), left anterior fascicular block (hazard ratio, 1.52; 95% CI, 1.08 to 2.13; P=0.017), left ventricular end-diastolic diameter (hazard ratio, 1.04; 95% CI, 1.02 to 1.06; P < 0.001), and serum sodium (hazard ratio, 0.95; 95% CI, 0.92 to 0.99; P=0.020) as independent predictors for death. CONCLUSIONS: CKD and anemia are not independent predictors for long-term mortality in CC patients. However, the prognosis is poorer in individuals with both comorbidities.