If a person has a heart murmur caused by the improper opening and closing of a heart valve, the ECG or heart sounds (choose one) will be unusual as the blood is forced through a more narrow opening (stenotic valve), or the blood backflows because the valve does not close properly (incompetent valve). Explain your reasoning for the answer choice.
Added by Nancy R.
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Heart valves ensure unidirectional blood flow through the heart chambers by opening and closing at appropriate times during the cardiac cycle. Show more…
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