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Bigeminy Pacing: A New Protocol to Unmask Atrial Vulnerability

Bigeminy Pacing and Atrial Vulnerability. Introduction: One of the most exciting developments in our understanding of atrial fibrillation (AF) mechanisms has been the recognition that “AF begets AF” in a process termed atrial remodeling. Little information is available about the events that mediate short‐term remodeling. In a bigeminy atrial pacing protocol that produces a continuous extrasystole‐postextrasystole cycle length, we sought to evaluate the electrophysiologic consequences of irregular atrial pacing.