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how does intraaortic balloon pump work - ANSWER ✓ inflates on t (diastole)
deflates on p (systole)
decreases afterload
increases diastolic pressure, therefore increasing coronary perfusion
when can you NOT use intraaortic balloon pump? - ANSWER ✓ aortic dissection
severe aortoiliac disease
aortic regurgitation
alpha 1 receptor causes - ANSWER ✓ vascular smooth muscle constriction
Alpha 2 receptors - ANSWER ✓ venous smooth muscle constriction
meta 1 receptor - ANSWER ✓ myocardial contraction and rate
Beta 2 receptors - ANSWER ✓ bronchodilation
relaxes vascular smooth muscle
increases renin
Dopamine receptors - ANSWER ✓ relax renal and splanchnic smooth muscle
Dopamine effects - ANSWER ✓ 2-5 mic/kg/min-renal
6-10- (Beta) HR and contractility
>10- alpha (vasoconstrict and up BP)
, dobutamine effects - ANSWER ✓ beta 1
increases contractility (MAIN)
tachycardia with higher doses
milrinone effects - ANSWER ✓ PDE inhibitor = up cAMP
increased Ca flux, increased myocardial contractility
causes vascular smooth muscle relaxation and pulmonary vasodilation
phenylephrine effects - ANSWER ✓ alpha 1
vasoconstriction
Norepinephrine effects - ANSWER ✓ a1, a2, some beta1
vasoconstrictor, up HR
epi low dose effects - ANSWER ✓ low dose = heta 1 and beta 2
increased contractility and vasodilation
epi high dose - ANSWER ✓ Alpha more than beta is affected.
vasoconstriction , increased cardiac ectopic pacer activity, myocardial o2
vasopressin v1 effects - ANSWER ✓ vasopressin causes v1,v2 effects
v1 = arterial vasoconstriction
vasopressin v2 effects - ANSWER ✓ intrarenal - water resorption at collecting
ducts
extrarenal - release of factor 8 and VWF