A heart attack occurs as a result of a blocked coronary artery. Since the coronary arteries are like pipelines running through the heart, a clot, blockage or spasm will restrict blood flow. The area of the heart that does not receive oxygen may become permanently damaged. Damage to the heart muscle occurs when the cells of the heart are starved of oxygen. These cells die because of the blockage. Eventually scar tissue is formed in the damaged area.
How your heart muscle heals?
After a heart attack, the heart muscle is damaged. The damaged area will heal and scar tissue will form. Small blood vessels can enlarge to nourish the area that surrounds the scar or damaged site. A partial scar is formed in three to four weeks. A firm scar develops anywhere from six weeks to three months after the initial injury.
New circulation surrounding the damage area is called collateral circulation. Aerobic exercise helps to form this new circulation that nourishes the heart. Rest and gradual increase in activity is the key to success. Aerobic exercise will strengthen the heart muscle and help it become a more efficient pump.