One Size Does Not Fit All: Tailoring Stress Tests for Athletes.

Area of Science:

• Sports Cardiology
• Exercise Physiology
• Cardiac Electrophysiology

Background:

• Athletes often exhibit unique physiological adaptations, including the "athlete's heart," which can alter responses to standard cardiovascular assessments.
• Exercise-induced tachycardia and palpitations are common complaints in athletes, necessitating accurate diagnostic approaches.

Observation:

• A 21-year-old collegiate track athlete experienced significant exercise-induced tachycardia (up to 240 bpm) with palpitations and lightheadedness during high-intensity anaerobic exercise.
• Initial standard exercise stress echocardiogram did not reveal arrhythmias, potentially leading to a false sense of security.

Findings:

• An outpatient Holter monitor eventually detected supraventricular tachycardia (SVT) specifically induced during sprinting.
• A uniquely designed stress test protocol, replicating the athlete's sport-specific metabolic demands, successfully elicited the arrhythmia and symptoms.

Implications:

• Standardized stress testing protocols may be insufficient for diagnosing exercise-related arrhythmias in highly trained athletes.
• Developing sport-specific, provocative stress testing is essential to accurately identify underlying cardiac pathologies in athletes and avoid misdiagnosis.