cardiac a&P Flashcards
each time heart beats
volume of blood is ejected
___________
CO
SVxHR= CO
amount of blood the heart pumps out of LV each min
CO
with HF
LV is weak and cant pump blood out = CO is ________
diminished
end diastolic volume
end systolic volume
blood in the ventricle before contraction
remaining blood in the ventricle after contraction
the amount of blood pumped out of the heart in a single contraction.
It’s calculated by subtracting the remaining blood in the ventricle after contraction (end systolic volume) from the total blood in the ventricle before contraction (end diastolic volume).
SV
preload
afterload
and
contractility
effect _____
SV…and thus CO
volume of blood in heart
force opposing ejection of blood from the ventricle (pressure)
contractile abilities of the heart
contractility
afterload
preload
preload
afterload
contractility
stretch of cardiac muslce cells before contraction
AKA
chamber volume just prior to contraction
preload
hypovolemia = less ventricular filling = _____ preload = ______ SV = ______ CO
less, less, less
increase in resting muscle length = greater muscle tension
length-tension relationship
This is similar to stretching a rubber band; the more you stretch it, the more force it will exert when released.
what law?
frank-starling law
the heart as the ability to change its force of contraction and SV in response to changes in venous return
This is similar to stretching a rubber band; the more you stretch it, the more force it will exert when released.
what law
frank-starling law
intracellular - fluid ____ cells
interstitial - fluid _____ cells
extracellular - fluid ____ cells, or inside capillary
inside
surrounds
outside
fluid in blood exerts ______ pressure
hydrostatic
force pushes fluid out of capillary into interstitial and intracellular spaces
hydrostatic pressure
particles in blood
albumin, sodium, glucose
exert ____ pressure
oncotic or osmotic
