Abstract Background: Cardiac resynchronization therapy (CRT) is beneficial for patients with heart failure (HF) who have left bundle branch block. However, the benefits of CRT in patients with prior cardiac stimulation remain uncertain. Objective: Compare short-term mortality between upgrade and de novo CRT implantation. Methods: This prospective cohort study included patients with HF indicated for CRT with left ventricular ejection fraction (LVEF) below 35%. Overall survival was assessed using the Kaplan–Meier method, and multivariate analysis was performed using a Cox […]

This case concerns a 62-year-old man diagnosed with chagasic cardiomyopathy, presenting with a dilated and arrhythmogenic form, showing significant ventricular dysfunction, and currently undergoing cardiac resynchronization therapy with a previously implanted implantable cardioverter defibrillator. In the outpatient setting prior to admission, the patient’s medical records indicate recurrent ventricular arrhythmias and multiple appropriate shocks from the device over recent years. Upon admission to the emergency department, the patient complained of severe asthenia, abdominal pain, postprandial vomiting, and choking persisting for a […]