heart attack — damage to an area of heart muscle that is deprived of oxygen, usually due to blockage of a diseased coronary artery, typically accompanied by chest pain radiating down one or both arms, the severity of the attack varying with the extent and location of the damage; myocardial infarction.
congestive heart failure — heart failure characterized by weakness, breathlessness, and abnormal congestion in the circulatory system, esp. in the lungs or lower legs