Restrictive cardiomyopathy, the rarest form of cardiomyopathy, is a condition in which the walls of the lower chambers of the heart (the ventricles) are abnormally rigid and lack the flexibility to expand as the ventricles fill with blood.
It is a really serious condition, especially in the young. There is ahigh risk of heart attack and stroke, and sudden cardaic arrest especially during exercise. Alot lead to heart failure and are treated with heart transplants. But of you're one of those cases that doesn't get really worse or is stable, then maybe a life-time of meds to heep your heart okay.