Cardiac Cycle, Dr. D. Penney





Table 1.03. The heart sounds (phonocardiogram)

SoundNormal ?causeWhere heard
S1 yesclosure of tricuspid/mitral valvesapex of heart
S2yesclosure of pulm. & aortic valvesabove heart base; aortic on R, pulm. on L.
S3noventricular fillingover heart?
S4noatrial systoleover heart?





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