S1 is associated with closure of which heart valves?

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Multiple Choice

S1 is associated with closure of which heart valves?

Explanation:
S1 is produced by the closure of the atrioventricular valves as the ventricles begin to contract. Specifically, the mitral valve on the left and the tricuspid valve on the right close, marking the start of ventricular systole. The mitral component is typically louder and heard best at the apex, while the tricuspid component is heard best along the left lower sternal border. This first sound helps clinicians identify the onset of systole and the functioning of the AV valves.

S1 is produced by the closure of the atrioventricular valves as the ventricles begin to contract. Specifically, the mitral valve on the left and the tricuspid valve on the right close, marking the start of ventricular systole. The mitral component is typically louder and heard best at the apex, while the tricuspid component is heard best along the left lower sternal border. This first sound helps clinicians identify the onset of systole and the functioning of the AV valves.

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