Regular bradycardia

Regular bradycardia is a cardiac rhythm characterized by a consistently slow heart rate, typically below 60 beats per minute, with a regular interval between beats. Clinically, it matters because it may indicate underlying conduction system disease or heightened vagal tone, affecting cardiac output and tissue perfusion. A key association is sinus bradycardia seen in athletes or hypothyroidism, which can cause fatigue or syncope if severe.