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Prolonged Ventricular Pauses in an Asymptomatic Athlete with “Apparent Mobitz Type II Second‐Degree Atrioventricular Block”

We report the case of a 30‐year‐old basketball player with asymptomatic, nocturnal ventricular pauses of >3,000 ms, the longest being ∼12,000 ms, who was misdiagnosed with Mobitz type II second‐degree atrioventricular (AV) block. Conversely, the tracings were characteristic of a vagally mediated AV block, a phenomenon first described by Massie and called “apparent Mobitz type II AV block.”