Answer:
Hypertrophic cardiomyopathy.
Step-by-step explanation:
Hypertrophic cardiomyopathy may be defined as the medical condition in which the heart muscle called myocardium gets extensively thick. There is difficulty in the blood flow in the body.
A 17 year athlete died due to heart's disease. The condition that most likely to cause the heart failure is Hypertrophic cardiomyopathy as the blood is unable to pump properly in the body.
Thus, the correct answer is Hypertrophic cardiomyopathy.