![]() ![]() The length of time depends on the extent of your injury and your rate of healing. It usually takes several weeks for your heart muscle to heal. Heart muscle damaged by a heart attack heals by forming scar tissue. The amount of damage to the heart muscle depends on the size of the area supplied by the blocked artery and the time between injury and treatment. When a heart attack occurs, the heart muscle that has lost blood supply begins to suffer injury. Collateral circulation can also develop after a heart attack to help the heart muscle recover. Such a network of expanded nearby blood vessels is called collateral circulation, and it helps protect some people from heart attacks by delivering needed blood to the heart. When a coronary artery narrows and constricts blood flow, other nearby blood vessels that serve the heart sometimes expand to compensate, which may explain why there may be no warning signs. But when an artery is narrowed by over 70%, muscle pain or cramps may occur when tissue needs more oxygen than it’s able to receive. The process of atherosclerosis may have no symptoms in its early stages. When damage or death to part of the heart muscle occurs due to ischemia, it’s called a heart attack, or myocardial infarction (MI).Ībout every 40 seconds, someone in the United States has a heart attack. Cardiac ischemia is decreased blood flow and oxygen to the heart muscle. Ischemia is a condition in which the blood flow (and thus oxygen) is restricted or reduced in a part of the body. This blood clot can block the blood flow through the artery to the heart muscle. When plaque within a heart artery breaks, a blood clot forms around the plaque. This slow process is known as atherosclerosis. This happens when coronary arteries that supply the heart muscle with blood flow become narrowed from a buildup of fat, cholesterol and other substances that together are called plaque. ![]() View an animation of blood flow between the heart and lungs. A heart attack occurs when the blood flow that brings oxygen to the heart muscle is severely reduced or cut off completely. Your heart muscle needs oxygen to survive. Heart attack questions and answers What is a heart attack? See how coronary artery damage leads to a heart attack. So use this information to live healthier and longer. Many people survive a heart attack and go on to enjoy productive lives.Īs you work toward recovery, the frequently asked questions below can help you better understand what’s happened, and how your heart can heal. If you’ve had one, or are close to someone who has, you’re not alone. National Hypertension Control InitiativeĪ heart attack is scary.Pets and Your Health / Healthy Bond for Life. ![]()
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