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Hypertrophic cardiomyopathy and ultra-endurance running - two incompatible entities?
Mathew G Wilson1, Navin Chandra, Michael Papadakis
1St George's University of London, Division of Cardiac & Vascular Sciences, London, UK.
Insights
Physiological left ventricular hypertrophy from exercise can mimic hypertrophic cardiomyopathy (HCM). This case shows an ultra-endurance runner with genetically confirmed HCM, challenging the notion that these conditions are incompatible.
Area of Science:
- Cardiology
- Sports Medicine
- Genetics
Background:
- Prolonged exercise can cause left ventricular hypertrophy, mimicking hypertrophic cardiomyopathy (HCM).
- Differentiating physiological from pathological hypertrophy is crucial, as HCM is a leading cause of sudden cardiac death in young athletes.
- Sudden cardiac death in athletes is often linked to 'start-stop' sports like soccer and basketball.
Observation:
- The study presents a case of an ultra-endurance athlete with extensive competitive running experience (>50 km).
- This athlete was diagnosed with genetically confirmed hypertrophic cardiomyopathy (HCM).
Findings:
- The findings demonstrate that ultra-endurance running and genetically confirmed HCM can coexist.
- This case challenges the existing theory that individuals with HCM cannot participate in endurance sports.
Implications:
- This case suggests that the "selection-out" theory for HCM in endurance sports may not be universally applicable.
- Further research is needed to understand the long-term outcomes and management of endurance athletes with HCM.
- Cardiologists should consider the possibility of HCM in endurance athletes presenting with cardiac hypertrophy.
Abstract:
Regular and prolonged exercise is associated with increased left ventricular wall thickness that can overlap with hypertrophic cardiomyopathy (HCM). Differentiating physiological from pathological hypertrophy has important implications, since HCM is the commonest cause of exercise-related sudden cardiac death in young individuals. Most deaths have been reported in intermittent 'start-stop' sports such as football (soccer) and basketball. The theory is that individuals with HCM are unable to augment stroke volume sufficiently to meet the demands of endurance sports and are accordingly 'selected-out' of participation in such events. We report the case of an ultra-endurance athlete with 25 years of > 50 km competitive running experience, with genetically confirmed HCM; thereby demonstrating that these can be two compatible entities.
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