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Systole Diastole


Diastole = Relaxation Phase 1 1) Isovolume relaxation. -Aortic closure -Mitral open -LV vol constant, decr pressure bc myofilament relaxation
Diastole = Relaxation Phase 2 Diastole Phase 2 - LV pressure < LA pressure, mitral open - Early fill diastole = ~70% of LV SV
Diastole = Relaxation Phase 3 Diastole Phase 3 LA=LV pressure - pulmonary venous return continues to flow to LV= DIASTASIS= LA conduit (Tachy may decr or eliminate diastasis)= 5% EDV
Diastole = Relaxation Phase 4 Diastole = Relaxation Phase 4 Atrial Systole = LA contraction = 15-20% EDV
Systole= Contraction Phase 1 Systole= Contraction Phase 1- Isovolumic Contraction Interval btw closure of mitral (S1) & aorta opening - LV volume constant (~120 ml), pressure increase until aorta open
Systole= Contraction Phase 2 Systole= Contraction Phase 2 - No true RV contraction - LV pressure > aorta= rapid ejections = ~2/3 (80 ml)
Systole= Contraction Phase 3 Systole= Contraction Phase 3- End systole - Aortic pressure increase, > than LV, so valve closes (S2)
What are the AV valves? Atrio-ventrical valve - Right = tricuspid - Left= mitral
What are the semilunar valves? Semilunar valves - Right = Pulmonary - Left= Aortic
Created by: nmctelos