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Heart as a pump

Heart as a pump. Heart as a pump. Heart as a pump. Excitation-contraction. Heart as a pump. The force-length relationship of myocardial fibers. Heart as a pump. The force-length relationship of myocardial fibers. Heart as a pump. Ventricular Pressure-Volume Relationship.

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Heart as a pump

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  1. Heart as a pump

  2. Heart as a pump

  3. Heart as a pump Excitation-contraction

  4. Heart as a pump The force-length relationship of myocardial fibers

  5. Heart as a pump The force-length relationship of myocardial fibers

  6. Heart as a pump Ventricular Pressure-Volume Relationship End -diastolic ventricular volume (ESV) End -systolic ventricular volume (EDV) Stroke Volume (SV) Ejection Fraction = SV/EDV

  7. Heart as a pump Ventricular Pressure-Volume Relationship

  8. Heart as a pump

  9. Heart as a pump • Contraction of the atrial muscle narrows the orifices of the superior and inferior vena cava and pulmonary veins

  10. Heart as a pump Cardiac valves and sounds • Av valves • Mitral • Tricuspid • Semilunar valves • Aorta • Pulmonary

  11. Heart as a pump Cardiac valves and sounds • Heart sounds • S1 • Low frequency • Loudest and longest • S2 • High frequency • Shorter duration • Low intensity • S3 • In children with thin chest wall and heart failure • In early diastole • S4 • Atrial contraction • Occasionally in healthy individual

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