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Obstructive Hypertrophic Cardiomyopathy in a Symptomatic Professional Athlete Treated With Mavacamten
Aakash Bavishi1, Dean Marella2, Jonathan H Kim3
1Department of Medicine, Division of Cardiology, University of Illinois College of Medicine, Chicago, Illinois, USA.
Background:
Management of left ventricular outflow tract obstruction (LVOTO) in competitive athletes with hypertrophic cardiomyopathy (HCM) is challenging, particularly when obstruction is exercise-induced and medical therapy is poorly tolerated.
Case Summary:
A 28-year-old professional athlete presented with recurrent syncope. Resting imaging showed asymmetric septal hypertrophy without obstruction, but stress echocardiography revealed severe dynamic LVOTO (peak gradient: 150 mm Hg). Beta-blockers caused fatigue with persistent gradients. After shared decision-making, mavacamten was initiated. Follow-up stress imaging demonstrated complete resolution of LVOTO with preserved systolic function. The athlete returned to professional competition and remained event-free at 2 years.
Discussion:
Current guidelines emphasize shared decision-making for athletes with HCM. This case highlights the importance of stress imaging to unmask LVOTO and supports mavacamten as a viable alternative.
Take-Home Messages:
Stress testing is critical in symptomatic athletes with HCM. Mavacamten may permit alleviation of LVOTO and safe return to play.
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