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A: Holter monitoring revealed transient advanced atrioventricular (AV) block during swallowing of meals. Sinus rate was maintained (>60 beats/min) at the time of the AV block. B: Intracardiac electrocardiography showed AH block during ingestion of a rice ball. C: Dilation of esophageal balloon under endoscopic guidance induced transient advanced AV block. D: After intravenous administration of atropine (0.5 mg), the AV block was no longer induced by esophageal balloon dilatation.
