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Exploring Heart Physiology: Essential Properties Unveiled

Discover the morphological, functional, and electrical properties of the heart, from automatism to echocardiography. Dive into the active potential phases of heart cells and the conductive system intricacies. Learn about automatisity and the pump work of the heart in detail.

jameshammons
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Exploring Heart Physiology: Essential Properties Unveiled

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  1. “Physiological properties of the heart”

  2. Contents: 1. Morphological and functional properties of the heart 2. Automatism 3. Excitability 4. Conductibility 5. Contractility 6. Pump work of the heart 7. Heart sounds 8. Echocardiography

  3. Automatisity • Is a property of heat to produce the bioelectrical impulses • SA-node – 60-90 /min • AV – node – 40-60 /min • Hiss bungle – 30-40 /min • Purkinje fibers - <20 /min

  4. Automatism

  5. Active potentialof contractiveheart cells

  6. Phases of active potential • 0 – depolarization • 1 – beginning rapid repolarization • 2 – slowly repolarization or plateau • 3 – ending rapid repolarization • 4 – rest period.

  7. - + + + + + Membrane - - - - - +

  8. Active potential of apitalcardiomyocytes 0 – rapid depolarization; 1 – rapid beginning repolarization; 2 – slowly repolarization; 3 – rapid spontaneosly repolarization; 4 – spontaneosly diastolic depolarization.

  9. - + + + + + Membrane - - - - - +

  10. Active potential, contraction, excitability of heart cells 4 – absolute refractivity; 5 – relative refractivity; 6 – period of increase excitability; 7 - exaltation

  11. Conductive system of heart 2 – SA node; 3 – Bachman tract; 4 – tracts of Bachman, Venkebach, Torel 6 – AV node 7 – Hiss bungle 8 – right leg of Hiss bungle 9 – anterior brunch of left leg of Hiss bungle 10 – posterior brunch of left leg of Hiss bungle 11 - Kent bungle 12 – Jams bungle 13 - Meacham bungle

  12. Thank you!

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