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Phys2 Cardiac cycle

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Question
Answer
show 1.Isovolumetric contraction. 2.Rapid Ejection. 3.Reduced Ejection. **All of this is occuring during Phase 2 of the ventricular AP.  
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show 1.Isovolumetric relaxation. 2.Rapid ventricular filling. 3.Reduced ventricular filling. 4.Atrial Systole (Pwave).  
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What determines whether or not a heart valve is open or closed?   show
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show 1A:Rapid inflow & diastasis. 1B:Atrial systole (P-R interval). 2:Isovolumetric contraction (QRS). 3:Rapid ejection. 4:Isovolumetric relaxation.  
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what wave represents Atrial systole (phase 1b of cardiac cycle)? how long does it take? does it contribute to the LV volume?   show
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show NO VALVE CHANGE!! the MAP is falling down closer to 80mmHg.  
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show 1.Valves: Mitral valve closes (initiates). 2.Pressure:rises from 15 to 80mmHg. 3.Volume:No change (EDV, flatline MAX on graph). 4.Sounds:S1 (mitral valve closing). 5.Atrial wave:C wave (mitral valve push into atria). 6.Time:0.05sec. 7.ECG:end of QRS  
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Rapid & Reduced Ejection (phase 3 of cardiac cycle)   show
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show MIDDLE  
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show Half way through the Ejection phase (3)  
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show 1.Valves:Aortic semilunar closes (mitral valve remains closed). 2.Pressure:Drops from 100 to 0mmHg. 3.Volume:No change (ESV, flatline MINIMUM). 4.Sounds:S2 (aortic closes). 5.Atrial wave:none. 6.Time:0.08s. 7.ECG:T wave  
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When does Isovolumetric relaxation (phase 4) and passive ventricular filling (phase 1a) begin?   show
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show The SLAMMING SHUT of the aortic semilunar valve. The elastic energy absorbed by the smooth muscle artery stretch during PEAK systolic pressure is used to maintain pressure  
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show 1.Valves:mitral valve opens (initiates). 2.Pressure:minimal changes. 3.Volume:Rises from ESV almost to EDV. 4.Sounds:S3. 5.Atrial wave: none. 6.Time:0.5s. 7.T-P segment.  
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How are the pressure changes in the R heart compared to the L heart?   show
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show NO. Low HR (60bpm): Diastole is 2X longer. High HR (180bpm): Diastole is 1/2 systole (which will decrease EDV)  
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show 0.35 seconds. (0.3sec is phase 3)  
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show 0.73 seconds (0.5sec is phase 1a)  
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