Lecture 6  The heart as a pump heart sounds and cardiac output Preloader

Lecture 6 The heart as a pump heart sounds and cardiac output - PowerPoint PPT Presentation


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Heart sounds. Mechanical events always follow electrical events (Study Fig 21-1)Heart sounds indirectly result from AV and Semilunar valve closure (reverberations and recoil of blood cause the actual sound) Valves open and close due to pressure changes within atria andventricles.4. Extra heart sounds (S3 and S4) may signify pathologic conditions. .

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