Junctional rhythm is an irregular heart rhythm that stems from a natural pacemaker in the heart known as the atrioventricular junction. The heart has several built-in pacemakers that help control its ...
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DALLAS, July 17, 2025 — Scar tissue in the heart was associated with abnormal heart rhythms among healthy, long-time male endurance athletes age 50 or older, potentially increasing their risk of ...