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in constrictive pericarditis pericardial knock heard..........
a. 0.06 - 0.12 second after aortic valve close
b. 0.06 - 0.12 second before aortic valve open
c. 0.06-0.12 second after mitral valve open
d. 0.06-0.12 second before mitral valve close
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a? is pericardial knock S3 sound, don;t remember??
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I change my answer should be earlyventricular filling so CCCC
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C .......and could be D too but i think time factor is more suggestive of C here
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An early diastolic sound analogous to the normal third heart sound, but occurring somewhat earlier, due to rapid ventricular filling being abruptly halted by the restricting pericardium...
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this pericardial Knock happens very soon after ventricle starts filling up as comapred with Normal Heart filling