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15 Cards in this Set
- Front
- Back
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be able to explain the wigger's diagram
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pg 118
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a wave
c wave |
measured in venous pressure, pressure from the atrial kick is also transmitted back through the venous system because there are no valves
cwave -ventricular contraction causes leaflets to bulge back into atrium |
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stroke volume
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EDV-ESV
115ml- 50 ml = ~65 ml |
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to increase cardiac output you can increase two things
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SV and HR
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ejection fraction
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efficiency of the heart
SV/total intraventricular volume % |
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what three pieces of calculable information can you obtain from a cardiac pressure volume loop
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SV, ejection fraction, and work
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what three pieces of behavioral information can be obtained from a cardiac pressure volume loop IE WHAT EFFECTS STROKE VOLUME
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preload, afterload and inotrpy
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does preload have an effect on aortic pressure
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no
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does afterload depend on muscle stretch or myosin actin overlap
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no, it is a function of contractility
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what is preload controlled by?,
afterload? inotropy? |
preload control - sympathetic NS on the venous compartment
inotropy - sympathetic NS (norepi and epi increases Ca) afterload -not regulated to control CO but is modified to maintain aortic pressure |
