Normal Blood Pressure And Heart Attack
What is a heart attack?
A heart attack is permanent damage to the heart muscle caused by loss of blood flow to the heart. A network of blood vessels, known as coronary arteries, surround the heart muscle and supply it with oxygen-rich blood. The heart needs this oxygen to function.
A heart attack occurs when a clot or spasm blocks an already narrowed coronary artery. Left without oxygen, the portion of the heart muscle served by the blocked artery is injured.
What is the link between high blood pressure and heart attack?
High blood pressure increases the risk of coronary artery disease (also called atherosclerosis).
Coronary artery disease is the buildup of plaque or fatty matter in the walls of the coronary arteries; this buildup leads to narrowing of the arteries over time. The narrowed artery limits or blocks the flow of blood to the heart muscle. The hardened surface of the artery can also encourage the formation of small blood clots.
People with high blood pressure are more likely to develop coronary artery disease because high blood pressure puts added force against the artery walls. Over time, this extra pressure can damage the arteries. These injured arteries are more likely to become narrowed and hardened by fatty deposits.
Damaged arteries cannot deliver enough oxygen to other parts of the body. For this reason, high blood pressure can harm the brain and kidneys. High blood pressure also increases the risk for stroke, congestive heart failure, kidney disease, and blindness.
What are the symptoms of high blood pressure?
High blood pressure usually has no symptoms. It is often called the "silent killer" because it can damage your heart, kidney, and brain, even though you feel no symptoms.
See the original source and complete article: http://my.clevelandclinic.org/
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