Download Factors Affecting Cardiac Output

VENOUS RETURN
FILLING TIME
VR = EDV
FT = EDV
VR = EDV
FT = EDV
INCREASED
BY
VASOCONSTRICTION
AFTERLOAD tension required to
open semilunar
valves & eject blood
PRELOAD degree of
ventricular
stretching
END-DIASTOLIC
VOLUME (EDV)
END-SYTOLIC
VOLUME (ESV)
HORMONES
amt. of blood in
ventricles at end
of diastole
amt. of blood in
ventricles at end
of systole
norepinephrine,
epinephrine,
and T3
VENOUS RETURN rate of blood flow through veins
FILLING TIME duration of ventricular diastole
STROKE VOLUME amount of blood pumped by L.
ventricle per heart beat (ml/beats)
(SV = EDV - ESV)
CARDIAC OUTPUT CO = SV x HR
DECREASED
BY
VASODILATION
STROKE VOLUME (SV)
CONTRACTILITY
OF
CARDIAC
MUSCLE CELLS
INCREASED
BY
S.D.
OF ANS
DECREASED
BY
P.D.
OF ANS
EDV = SV
ESV =
SV
HEART RATE
(HR) = beats/min
EDV = SV
ESV =
SV
VR = HR
CARDIAC OUTPUT
(C0) = ml/min
amt. of blood pumped
by L. ventricle/min