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Angina - Causes - Causes

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Angina happens when your heart muscle does not get enough oxygen-rich blood. Medical conditions, particularly ischemic heart disease, or lifestyle habits can cause angina. To understand the causes of angina, it helps to understand how the heart works.

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\n Ischemic heart disease \n
- Angina - Causes

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Two types of ischemic heart disease can cause angina.

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  • Coronary artery disease happens when plaque plaque (Plak):
    A substance made up of fat, cholesterol, calcium, and other substances found in the blood. In some cardiovascular diseases, plaque builds up and hardens in arteries. Plaque buildup reduces blood flow and makes it more likely that blood clots will form in the arteries. These blood clots can partially or completely block blood flow and oxygen delivery to the heart, brain, kidneys, or legs, arms, or pelvis.     builds up inside the large arteries that supply blood to the heart. This is called atherosclerosis. Plaque narrows or blocks the arteries, reducing blood flow to the heart muscle. Sometimes plaque breaks open and causes blood clots blood clot (blud klot):
    A gel-like clump that forms when blood changes from a liquid to a solid state. Blood clots are necessary to help stop bleeding after an injury. An abnormal blood clot that forms inside an artery or vein is called a thrombus. A piece of the blood clot, called an embolus, can break off and move through the bloodstream. The embolus can block blood flow in another part of the body, such as the brain or lungs.     to form. Blood clots can partially or totally block the coronary arteries.
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  • Coronary microvascular disease affects the tiny arteries that branch off the larger coronary arteries. Reduced blood flow in these arteries causes microvascular angina. The arteries may be damaged and unable to expand as usual when the heart needs more oxygen-rich blood.
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\n Spasm of the coronary arteries \n
- Angina - Causes

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A spasm that tightens your coronary arteries can cause angina. Spasms can occur whether or not you have ischemic heart disease and can affect large or small coronary arteries. Damage to your heart\u2019s arteries may cause them to narrow instead of widen when the heart needs more oxygen-rich blood.

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What happens in the heart during an angina event?

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In one day, your heart beats about 100,000 times and pumps about 2,400 gallons of blood throughout your body. To meet this demand, your heart\u2019s cells needs a great deal of oxygen, which is supplied by the large coronary arteries and the tiny arteries that branch off the large arteries. When your heart is working hard, such as during physical activity or emotional stress, its demand for oxygen increases. Angina occurs when there is an imbalance between the heart\u2019s need for oxygen-rich blood and the ability of the arteries to deliver blood to all areas of the heart.

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- Angina - Causes

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  • Treatment will discuss heart-healthy lifestyle changes that your doctors may recommend if you are diagnosed with angina.
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Syndicated Content Details:
Source URL: https://www.nhlbi.nih.gov/subscribe/3742
Source Agency: National Heart, Lung, and Blood Institute (NHLBI)
Captured Date: 2019-03-06 20:39:00.0
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