C167489Level 6

S1 Heart Sound

**Semantic type:** Finding

**Definition:** An auscultated finding describing the heart sound that occurs with ventricular systole and is produced mainly by closure of the atrioventricular valves, signifying the first heart sound. (ACC/AHA)

**Synonyms:** - S1

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C168060Abnormal S1 Heart Sound

C168061Loud S1 Heart Sound

C168062Normal Split S1 Heart Sound

C168063Reverse Split S1 Heart Sound

C168064Single S1 Heart Sound

C168065Soft S1 Heart Sound

C168066Widened S1 Heart Sound

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