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Basically a heart attack is when one part of the heart requires more oxygen-containing blood than it is getting. Usually that happens because one (or more) of the blood vessels which supply blood to the heart muscle are blocked, often by build-up in the blood vessels due to cholesterol.
When the heart muscle can't get the oxygen it needs, the cells are injured and can die. This causes the pain that is felt during a heart attack. When the cells die, they leave scar tissue behind, which will keep the heart from contracting as effectively in the future (because muscle contracts, while scar tissue doesn't).
If the heart attack is a really big one-- a whole lot of the muscle can't get oxygen-- then the heart won't beat effectively enough to keep the person alive.
Wiki User
∙ 13y ago
Wiki User
∙ 11y ago- The hardening and narrowing process of atherosclerosis takes many years and can cause no symptoms for a long time. But when fatty deposits build up to an extent that the artery is significantly damaged, it can cause any of the following.
Wiki User
∙ 12y agoCoronary Heart disease (CHD) is a leading cause of death among Americans. An estimated 13 million people are affected by CHD. The disease affects nearly every part of the body. Organ failure and even death can occur due to a lack of oxygen in the blood caused by CHD.
Wiki User
∙ 11y agoThe heart, a clot forms in a blood vessel that brings blood to fuel the heart, not to the atriums
Wiki User
∙ 11y agoWell, I believe that would be the Heart.
Wiki User
∙ 11y agohearts
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