A heart attack occurs when the flow of blood to the heart is blocked, often by a buildup of fat, cholesterol, and other substances, forming a plaque in the arteries. If blood flow is not restored quickly, the section of heart muscle begins to die, starving for oxygen. This causes a heart attack. A heart attack can also be caused by the rupture of the coronary artery. During a coronary rupture, the coronary arteries get restricted, reducing blood supply to the heart muscle.
Each coronary artery supplies blood to a region of the heart muscle.
Extent of damage to the heart muscle depends on the area supplied by the blocked artery and time between injury and treatment. Making some changes in your diet; how consistently you exercise; how much you weigh and how you manage stress can help you to recover from a heart disease quickly.