Ventricular Function 1 Flashcards Preview

S&F III: Exam 1 > Ventricular Function 1 > Flashcards

Flashcards in Ventricular Function 1 Deck (20):
1

stroke volume

vol of blood released from ventricle during one contraction (difference btwn ESV and EDV)

2

relationship btwn LV vol and InV pressure

directly proportional, max at 150*

3

preload

filling of ventricles, venous return

the magnitude of the maximal (end-diastolic) ventricular volume or the end-diastolic pressure stretching the ventricles.

4

what causes atrial systole

SA node
(p wave)

5

afterload

resistance of ventricle has to overcome in order to eject blood into vasculature

*indicated by pressure in artery

6

contractility (inotropy)

intrinsic property of myocardium that accounts for changes in strength of contraction when pre-&after-load static

7

end diastolic volume

vol of blood in ventricle at end of ventricular filling

8

end systolic volume

vol of blood in ventricle at end of ejection

9

ejection fraction

fraction of end-diastolic volume that is ejected during systole

normal= >55%

10

cardiac output

volume of blood ejected by ventricle per minute

11

ventricular compliance (C)

change in pressure/change in volume

describes ability of ventricle to accommodate volume

12

vessel compliance

change in volume/change in pressure

13

ESVPR

max pressure that the ventricle can develop for any given ventricular vol. at a given ionotropic state

14

EDVPR

the passive filling curve for the ventricle

15

chronotropy

cardiac rate

16

lusitropy

relaxation of myocardium

17

V0

pt at which an increase in vol causes detectable increase in intraventricular pressure

18

Frank-Starling Law (length-tension)

vol. of blood ejected during systole is determined by vol of blood in ventricle @ end of diastole

19

actively developed pressure

the difference between S & D at any point on the PV graph

20

reciprocal of compliance

tangent slope of compliance curve