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32 Cards in this Set

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  • Back

First line medications for heart failure

Diuretics


ACEI


ARBs

Drug of choice for HF

ACEI

Diuretics reduce mortality?

No

Why do you not use beta blockers in acute HF

Because of its contractility lowering effects

Digoxin, which is a cardiac glycoside, is a positive inotropic Drug. What does that mean?

Increased contractility, decreased HR

Therapeutic Digoxin serum level?

0.8-2.0 (>2.0 is toxic!)

MOA of digoxin

Promotes movement of calcium from extracellular to intracellular (increases the plateau)

What is Digoxin used for?

HF (lower dose, 1.0 or less)


AFIB/Flutter (higher dose)

Digoxin is cleared by the

Kidneys

Digitalizing dose is also known as well

Loading dose

Digoxin Takes how many weeks to work and how many weeks to eliminate the drug?

One week for both (unless digitalized)

Contraindications for Digoxin

Severe myocarditis, Vtach or Vfib, MI or heart block, electrolyte imbalances, renal impairment

These electrolyte imbalances can cause Digoxin toxicity

Hypokalemia, hypomagnesemia, hypercalcemia

What condition can delay Digoxin metabolism?

Hypothyroidism

Hypoxia increases ________ sensitivity to Digoxin

Myocardial

Antidote for Digoxin and mode of action

Digibind, pulls Digoxin out of tissue and into blood and inactivates it. Serum Digoxin levels will be high, but the drug will be inactivated

Reduce Digoxin by ___% in renal failure

50%

Hold Digoxin if HR is LESS THAN

60

Normal heart can maintain adequate CO with ventricular rates of

40-150 (diseased 60-120)

MOA in rapid dysthymics (3)

Reduce automaticity, slow conduction of electrical impulses through heart, prolong the refractory period of myocardial cells

How does propranolol work in dysthymias

Blocks SNS stim of beta receptors in the heart

How does diltiazem work in dysthymias

Reduces automaticity, slows conduction, prolongs refractory

What does stimulation of beta 2 receptors do

Bronchodilate, increase glucose

What does stimulation of Alpha 1 receptors do

Vasoconstriction

What receptors does epinephrine stimulate?

Beta 1, 2, & Alpha 1

What receptors do Isuprel stimulate?

Beta 1 & 2

What receptors does phenylephrine stimulate?

Alpha (vasoconstriction)

Dopamine stimulates what receptors

Alpha and beta

Dobutamine mainly acts on _________ receptors, but what is special about it?

Beta 1.


Increased contractility, minimal HR increase

What does milrinone do?

Increase CO, decrease PVR

What medication is first line tx in septic shock?

Norepinephrine (Levophed)

Levophed stimulates what receptors?

Alpha (vasoconstriction) and beta 1 (increased HR and contraction). Use in pts unresponsive to dopamine or dobutamine