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Swallow syncope (overnight ECG)

Overnight ECG showing transient high-grade, second-degree atrioventricular block on a background of 2:1 second-degree atrioventricular block. (Source: Malone K, Modi M, Koripalli S, Amorn A, Stevens CM. Swallow syncope associated with intermittent sinus pause and high-degree atrioventricular block: a case report. Cureus 2022;14(3):e22915. Creative Commons Attribution License [CC-BY 4.0].)

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