PMC3716027_01
Cardiac monitoring following ingestion of 500 ml of a cold carbonated beverage. The patient had marked sinus bradycardia of 30 beats per minutes after the one sip. Following the bradycardia was a 3.5-second sinus pause with second-degree Mobitz Type 1 AV block. He complained of near syncope during the event.
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Subsequently, he has had no more syncopal episodes, although he continues to have the sensation of near syncope (nausea and lightheadedness) upon swallowing (Fig. 1).