Myocardial viability is the ability of heart muscle to contract and have adequate muscle tone around the left ventricle to pump blood throughout the body.
If blood flow to the heart muscle has been decreased or absent due to coronary artery disease, the heart tissue may appear to have irreversible myocardial damage. In some cases, if the blood flow is restored to the heart through angioplasty or coronary bypass surgery, the heart tissue will recover.