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Heart Sound

Heart Sound

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Heart Sound First heart sound (S1): Due to closure of AV valves (mitral and tricuspid) Low pitched Duration: 0.14 seconds Soft S1:  Mitral stenosis (long-standing, calcified), mitral regurgitation Loud S1:  Mitral stenosis (prolonged flow through AV valve), anemia, fever, thyrotoxicosis Second heart sound (S2): Due to closure of semilunar valves (aortic, pulmonary) High pitched Wide […]

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Heart Sound

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HEART SOUND Q. 1 First heart sound occurs during the period of:  A Isovolumetric relaxation  B Isotonic relaxation  C Isovolumetric contraction  D Isotonic contraction Q. 1 First heart sound occurs during the period of:  A Isovolumetric relaxation  B Isotonic relaxation  C Isovolumetric contraction  D Isotonic contraction Ans. C Explanation: First heart sound is a low,

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