Which term describes extra heart sounds S3 or S4, depending on cycle location?

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Multiple Choice

Which term describes extra heart sounds S3 or S4, depending on cycle location?

Explanation:
S3 and S4 are extra heart sounds that create a gallop rhythm. The S3 occurs soon after the second heart sound during rapid ventricular filling in early diastole, while the S4 occurs late in diastole just before the first heart sound, caused by atrial contraction against a stiff ventricle. Together, these sounds describe a gallop, which is why this term best matches S3 or S4 depending on where you are in the cardiac cycle. A murmur is a turbulent flow sound from valve leakage or stenosis, not an extra heart sound; a click is a short high-pitched sound typically from valve prolapse or a prosthetic valve; JVD is a physical finding, not a heart sound.

S3 and S4 are extra heart sounds that create a gallop rhythm. The S3 occurs soon after the second heart sound during rapid ventricular filling in early diastole, while the S4 occurs late in diastole just before the first heart sound, caused by atrial contraction against a stiff ventricle. Together, these sounds describe a gallop, which is why this term best matches S3 or S4 depending on where you are in the cardiac cycle. A murmur is a turbulent flow sound from valve leakage or stenosis, not an extra heart sound; a click is a short high-pitched sound typically from valve prolapse or a prosthetic valve; JVD is a physical finding, not a heart sound.

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