Which rhythm is considered normal and often seen in athletes?

• A. Premature Atrial Complex
• B. Atrial Fibrillation
• C. Ventricular Tachycardia
• D. Asystole

Answer: (A)

Premature atrial contractions can be a normal finding in healthy athletes because of higher vagal tone and occasional ectopic atrial activity. An isolated premature atrial beat shows up as an early P wave with a different shape, followed by a normal narrow QRS, and is often preceded by a brief pause. When these early beats occur infrequently, they’re usually benign and commonly observed in athletes during rest or recovery.

In contrast, atrial fibrillation presents as an irregular rhythm with no discrete P waves and a variable ventricular response, which is not considered a normal finding. Ventricular tachycardia is a rapid, wide-complex rhythm that can compromise hemodynamics and is a serious condition. Asystole is a complete absence of electrical activity, a dire emergency. Therefore, the rhythm most consistent with a normal, often seen in athletes scenario is a premature atrial contraction.