The disease begins in a blood clot in a vein, usually deep veins in the legs or in the arms and other veins.
Hypertrophic cardiomyopathy is considered a frequent cause of death for young athletes, who have no obvious symptoms.
There are four main causes of sudden death: cardiovascular problems, stroke, pulmonary embolism and aortic rupture.
Experts warn, too eager to watch TV makes you sit for hours continuously increasing the risk of forming blood clots causing pulmonary embolism leading to death.