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Flashcards in Regulation of Cardiac Output Deck (4)
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What is cardiac index?

CI=CO/Body surface
*it normalizes cardiac output for body type.
*young kids & old ppl have a low CI.


While a higher HR causes increased CO...what happens when you reach a HR of like 175 bpm?

Once you reach a super high HR the ventricle doesn't have enough time to fill properly. This decreases preload & SV & CO.


What is the implication of a high mean systemic filling pressure on venous return?

The higher it is...the more the venous return curve is shifted outward-->this means that at a low RA pressure...there will be greater venous return.


What does cardiac hypertrophy do to EDV?

It decreases it.
B/c a stiffer heart is harder to distend.