Why must hypertrophic cardiomyopathy and aortic stenosis be excluded in individuals with a murmur?

• A. Both conditions carry a high risk of exercise-related sudden cardiac death.
• B. They never cause symptoms.
• C. Murmurs confirm these conditions.
• D. They are unrelated to exercise risk.

Answer: (A)

When you hear a murmur, it’s important to consider serious structural heart diseases that could make exercise risky. Hypertrophic cardiomyopathy and aortic stenosis are two such conditions because they substantially increase the likelihood of exercise-related sudden cardiac death. Hypertrophic cardiomyopathy can provoke malignant arrhythmias and syncope during activity, while aortic stenosis creates a fixed obstruction that can lead to chest pain, fainting, or heart failure as the heart demands more during exercise. Murmurs themselves aren’t diagnostic; they signal that something abnormal might be present and needs further testing, usually an echocardiogram, to confirm or exclude these conditions. So the reason to exclude them in someone with a murmur is the significant exercise-related risk they carry, not because murmurs always confirm the conditions, never cause symptoms, or are unrelated to exercise risk.