Cardio-physiology Flashcards Preview

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Flashcards in Cardio-physiology Deck (14):
1

decreasing the radius of an artery by 50%

changes in blood flow

decrease by 1/16

2

supine --> standing position (orthostatic hypotension after sympathectomy)

contractility

increases

to compensate for decrease venous blood return, decrease CO, and arterial pressure

due to decreased response of the baroreceptor mechanism

3

where is systolic blood pressure the highest

renal artery (for some reason)

4

ejection fracture increases,

there will be a decrease in

end-systolic volume...most direct result

5

ventricular extrasystoles

extrasystolic beat would cause decreasd pulse pressure because stroke volume is decreased

the next 'normal' beat would produce increased pulse pressure because the contractility of the ventricle will increase (increased Ca2+ left over from extra beat before)

6

2 p-waves before QRS complex

decreased conduction through AVN

7

greates pressure decrease in the circulation at the arterioles because

they have the greatest resistance

8

pulse pressure is determined by

stroke volume

9

when during cardiac cycle is the aortic pressure the highest

reduced ventricular ejection (highest volume)

10

histamine

vasodilation of aterioles

venous contriction

11

CO2 regulates blood flow what organ

brain

12

CO on right side of heart is what % of left side

100%

13

increased size of heart on myocardial O2 consumption

increases it

14

what would increase a kidney's production of renin

decreased perfusion to that kidney (not always bilateral)