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15 Cards in this Set

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be able to explain the wigger's diagram
pg 118
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
EDV-ESV
115ml- 50 ml = ~65 ml
to increase cardiac output you can increase two things
SV and HR
ejection fraction
efficiency of the heart

SV/total intraventricular volume
%
what three pieces of calculable information can you obtain from a cardiac pressure volume loop
SV, ejection fraction, and work
what three pieces of behavioral information can be obtained from a cardiac pressure volume loop IE WHAT EFFECTS STROKE VOLUME
preload, afterload and inotrpy
does preload have an effect on aortic pressure
no
does afterload depend on muscle stretch or myosin actin overlap
no, it is a function of contractility
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