Heart Attack Underlying Cause
A heart attack is caused by a clot that blocks the flow of blood through a coronary artery. The coronary arteries become narrowed by a process known as atherosclerosis, which is also called hardening of the arteries. Once the arteries become narrowed, a clot can completely block the artery. The clot interrupts the blood flow and the supply of oxygen to part of the heart muscle.
The process of atherosclerosis includes:
- The inner wall of the artery becomes damaged by:
- As the wall or the artery attempts to repair itself, cholesterol builds up on the inside surface of the artery, forming a plaque.
- Plaques narrow the inside of the arteries, which reduces blood flow. This can lead to blood clot formation inside the vessel.
Continue to Heart Attack Anatomy
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