Mitral regurgitation is a disorder when the mitral valve if the left side of the heart does not close properly. Backflow means that the valve is leaking and is not completely closed.
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He should target an intensity of about 110 bpm. It is bad for Max to exercise at his max heart rate for an extended period of time because it raises the risk of him having a heart attack.
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I think C because if you change the hygiene standards, the new employees might realize that they need to follow expectations.
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