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32 Cards in this Set
- Front
- Back
First line medications for heart failure |
Diuretics ACEI ARBs |
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Drug of choice for HF |
ACEI |
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Diuretics reduce mortality? |
No |
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Why do you not use beta blockers in acute HF |
Because of its contractility lowering effects |
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Digoxin, which is a cardiac glycoside, is a positive inotropic Drug. What does that mean? |
Increased contractility, decreased HR |
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Therapeutic Digoxin serum level? |
0.8-2.0 (>2.0 is toxic!) |
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MOA of digoxin |
Promotes movement of calcium from extracellular to intracellular (increases the plateau) |
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What is Digoxin used for? |
HF (lower dose, 1.0 or less) AFIB/Flutter (higher dose) |
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Digoxin is cleared by the |
Kidneys |
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Digitalizing dose is also known as well |
Loading dose |
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Digoxin Takes how many weeks to work and how many weeks to eliminate the drug? |
One week for both (unless digitalized) |
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Contraindications for Digoxin |
Severe myocarditis, Vtach or Vfib, MI or heart block, electrolyte imbalances, renal impairment |
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These electrolyte imbalances can cause Digoxin toxicity |
Hypokalemia, hypomagnesemia, hypercalcemia |
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What condition can delay Digoxin metabolism? |
Hypothyroidism |
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Hypoxia increases ________ sensitivity to Digoxin |
Myocardial |
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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 |
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Reduce Digoxin by ___% in renal failure |
50% |
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Hold Digoxin if HR is LESS THAN |
60 |
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Normal heart can maintain adequate CO with ventricular rates of |
40-150 (diseased 60-120) |
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MOA in rapid dysthymics (3) |
Reduce automaticity, slow conduction of electrical impulses through heart, prolong the refractory period of myocardial cells |
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How does propranolol work in dysthymias |
Blocks SNS stim of beta receptors in the heart |
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How does diltiazem work in dysthymias |
Reduces automaticity, slows conduction, prolongs refractory |
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What does stimulation of beta 2 receptors do |
Bronchodilate, increase glucose |
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What does stimulation of Alpha 1 receptors do |
Vasoconstriction |
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What receptors does epinephrine stimulate? |
Beta 1, 2, & Alpha 1 |
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What receptors do Isuprel stimulate? |
Beta 1 & 2 |
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What receptors does phenylephrine stimulate? |
Alpha (vasoconstriction) |
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Dopamine stimulates what receptors |
Alpha and beta |
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Dobutamine mainly acts on _________ receptors, but what is special about it? |
Beta 1. Increased contractility, minimal HR increase |
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What does milrinone do? |
Increase CO, decrease PVR |
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What medication is first line tx in septic shock? |
Norepinephrine (Levophed) |
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Levophed stimulates what receptors? |
Alpha (vasoconstriction) and beta 1 (increased HR and contraction). Use in pts unresponsive to dopamine or dobutamine |