Surveillance after cardiac arrest in patients with Brugada syndrome without an implantable defibrillator: An alarm effect of the previous syncope.

Background: Debate regarding the prognosis of asymptomatic patients with Brugada syndrome (BrS) is possibly affected by the selection bias of survivors of sudden cardiac arrest (SCA). We aimed to determine variables influencing surveillance after SCA.

Methods: We analyzed a BrS cohort of 145 patients belonging to 37 families.

Superior vena cava flutter: electrophysiology and ablation.

Introduction: Reentry within a major thoracic vein has been suggested as a cause of atrial arrhythmias. However, little is known about these potential reentrant circuits.

Methods And Results: Atypical atrial flutter was induced and mapped in 67 out of 225 atrial flutter ablation procedures.