ST depression: ST depression has many causes. When it is recorded during a cardiac stress test, it may indicate the risk of having a heart attack. It is not a perfect measurement. Sometimes it is a misleading measurement. The cause of the depression, and measurement in electrical potentional, has to do with electricity in muscle cells of the heart. http://circ.ahajournals.org/content/122/24/2570.full
Answered 6/27/2017
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