The First Brazilian Cardiovascular Registry of Atrial Fibrillation: Primary Results of the RECALL Study.

Background: It is estimated that atrial fibrillation (AF) affects approximately 1.5 million people in Brazil; however, epidemiological data are limited. We sought to evaluate the characteristics, treatment patterns, and clinical outcomes in patients with AF in Brazil by creating the first nationwide prospective registry.

Favorable effects of the optimized drug treatment of heart failure on ventricular arrhythmias.

Background: Ventricular arrhythmic events have a strong impact on the mortality of patients with heart failure. The benefits of the optimized drug treatment of heart failure in reducing ventricular arrhythmia have not been well documented yet.

Objective: To analyze the effects of the optimized drug treatment of heart failure on ventricular arrhythmia.

Concealed accessory pathway with long conduction times and incremental properties: a case report.

Concealed AP with Slow and Incremental Conduction. We report a peculiar form of permanent junctional reciprocating tachycardia that occurs only during daytime and physical activity. ECG obtained during tachycardia showed an unusual progressive shortening of the ventriculoatrial (VA) interval that was maximal at the first complex and shortest at the last one before block occurred, always at the accessory pathway level.