The risk of cardiomyopathy is much greater in smokers than in nonsmokers. Smoking may bring on this disease by damaging small arteries, or the carbon monoxide in cigarette smoke may damage the heart muscle directly. It's also possible that smoking increases the heart muscle's susceptibility to a virus infection that can cause cardiomyopathy.
definition
Cardiomyopathy is a disease that causes extensive damage to the heart muscle. Over time, the heart loses its ability to function. People with this disease get very tired and have trouble breathing; eventually, they may need heart transplants to stay alive.