Heart Cycle Review Session .pptx

Heart Cycle Review Session .pptx - Cardiac Cycle Taziah...

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Cardiac Cycle Taziah Kenney, ATC
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Important Information to Remember Pressure is extremely important in the cardiac cycle Movement of blood (High pressure to low pressure) Operation of valves (Pressure must reach a certain point to open valves) Pressure and Volume are directly proportional The LEFT side of the heart has 5X more pressure than the right but, they pump the same amount of blood Depolarization leads to contraction Systole: Contraction Repolarization leads to relaxation Diastole: Relaxation
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Timeline of Cardiac Cycle Quiescent Period : Rest Period, neither atria nor ventricles are contracting Atrial Systole : Atria contract Isovolumetric Contraction : The ventricles contract with no change in volume Ventricular Systole : Ventricles contraction continues Isovolumetric Relaxation : Ventricular contraction complete
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Quiescent Period No contraction is occurring Rapid ventricle filling
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