Several: Angina is chest, jaw, arm, back or shoulder pain that comes from the heart due to lack of proper blood flow to heart muscle. The classic cause of angina is coronary disease, this is typically cholesterol blockage of the arteries of the heart. Another cause is "syndrome x" which is spasm in the small vessels of the heart. Prinzmetal angina is caused my spasm (pinching) of larger heart arteries.
Answered 12/13/2015
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