Practice, Key Topics & Clinical Review)
Sympathetic nervous system effects - ✔✔increases HR, causes vasoconstrictions, increases
contractility
CO= - ✔✔SV+HR=
HR increased by - ✔✔PNS stimulation
HR increased by - ✔✔SNS stimulation
preload - ✔✔volume of blood that results in pressure or stretch of the vents during diastole,
affected by amount of venous return to heart
stroke volume + affected by - ✔✔preload
contractility
stroke volume - affected by - ✔✔afterload
preload - affected by - ✔✔loss of intravascular volume- hemorrhage, diuresis, v/d, third
spacing, redistribution of blood flow
preload + affected by - ✔✔venous return
peripheral vasocxn
alpha adrenergics (epi, norepi, dopamine)