The closure of the atrioventricular valves marks the start of

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asked Jul 12, 2024 192k views

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Kkrugler · Answer 1 · 2024-07-17T11:12:10+0000

Answer:

systole

Step-by-step explanation:

The first heart sound (S1) represents closure of the atrioventricular (mitral and tricuspid) valves as the ventricular pressures exceed atrial pressures at the beginning of systole (point a).

The closure of the atrioventricular valves marks the start of

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