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2. Angina - Wikipedia

   en.wikipedia.org/wiki/Angina

   a reduction of blood flow to the heart that can be caused by stenosis, spasm, or acute occlusion (by an embolus) of the heart's arteries. resistance of the blood vessels. This can be caused by narrowing of the blood vessels; a decrease in radius. [33] Blood flow is proportional to the radius of the artery to the fourth power.

3. Variant angina - Wikipedia

   en.wikipedia.org/wiki/Variant_angina

   Variant angina. Variant angina, also known as Prinzmetal angina, vasospastic angina, angina inversa, coronary vessel spasm, or coronary artery vasospasm, [2] is a syndrome typically consisting of angina (cardiac chest pain). Variant angina differs from stable angina in that it commonly occurs in individuals who are at rest or even asleep ...

4. Coronary ischemia - Wikipedia

   en.wikipedia.org/wiki/Coronary_ischemia

   Coronary ischemia, myocardial ischemia, [1] or cardiac ischemia, [2] is a medical term for abnormally reduced blood flow in the coronary circulation through the coronary arteries. [3] Coronary ischemia is linked to heart disease, and heart attacks. [4] Coronary arteries deliver oxygen-rich blood to the heart muscle. [5]

5. What Causes a Heart Attack? - AOL

   www.aol.com/causes-heart-attack-140000540.html

   A coronary spasm is a sudden and temporary spasm or the narrowing of the coronary artery. Ths spasm usually goes away on its own, but spasms that are severe or last long enough can cause a heart ...

6. Coronary vasospasm - Wikipedia

   en.wikipedia.org/wiki/Coronary_vasospasm

   Coronary vasospasm refers to when a coronary artery suddenly undergoes either complete or sub-total temporary occlusion. [1] In 1959, Prinzmetal et al. described a type of chest pain resulting from coronary vasospasm, referring to it as a variant form of classical angina pectoris. [2] Consequently, this angina has come to be reported and ...

7. Clogged Arteries Can Play a Significant Role in Severe Heart ...

   www.aol.com/clogged-arteries-play-significant...

   Those symptoms can also come as a result of a coronary artery spasm, which occurs when an artery in the heart squeezes shut. Clogged arteries can cause those events, as well. 4.