In adults, heart murmurs are often indicative of defective

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Heart murmurs in adults are often caused by defects in heart valves, such as a narrowing or leakage of the valve. This can lead to abnormal blood flow through the heart, which produces the sound of a heart murmur. SA nodes are responsible for initiating the heartbeat, not producing heart murmurs. Systemic arteries and coronary circulation are not directly related to heart murmurs either. Myocardial cells can be involved in certain heart conditions that cause murmurs, but the defective valve is the primary cause.

In Adults, Heart Murmurs Are Often Indicative of Defective