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Systole Diastole
phases
Question | Answer |
---|---|
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 |