Rectal exam unexpectedly halts AFib in a 29-year-old man
A 29-year-old man in Queens developed sudden atrial fibrillation with a heart rate around 140 bpm. After admission, doctors planned cardioversion but first performed a digital rectal exam to check for GI bleeding before anticoagulation. During the exam, his heart rate slowed to 80 bpm and the AFib rhythm resolved to normal sinus rhythm; Palpitations subsided and he was discharged, with no recurrence at a 3‑month follow-up. The report suggests the rectal exam may have stimulated the vagus nerve via the Valsalva maneuver, increasing parasympathetic activity and slowing heart conduction, potentially counteracting the arrhythmia. Researchers caution it should not replace standard AFib treatments and call for more study to validate this approach.