PRELOAD AND AFTERLOAD
Preload
Volume of blood in ventricles at end of diastole (end diastolic pressure)
Increased in:
Hypervolemia
Regurgitation of
cardiac valves
Heart Failure
Afterload
Resistance left ventricle must overcome to circulate blood
Increased in:
Hypertension
Vasoconstriction
Afterload = Cardiac workload