Which is true about heart sound?
Correct Answer: First heart sound has maximum duration
Description: Ans. B First heart sound has maximum durationHeart soundFrequencyDurationAssociated eventFirst heart25-45 Hz0.15 secClosure of A-V valves--onset of ventricular systoleSecond heart sound50 Hz0.12 secClosure of semilunar valves--onset of ventricular diastoleThird heart soundLow0.1 secFirst rapid filling phase of ventricular diastoleFourth heart soundBelow 20 Hz0.1 secLast rapid filling phase of ventricular diastole due to atrial contraction
Category:
Physiology
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