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30 Cards in this Set

  • Front
  • Back
If pt has a wide QRS in NSR then do:
Cardiac resynchronization
Vasodilators work on decreasing ____ and increasing ______.
Preload; tissue perfusion
Drugs with positive inotropic effects used in CHF mainly work;
On the heart
Drugs without positive inotropic effects used in CHF mainly work:
Outside of the heart
Three drugs that are + inotropes:
Dig, catecholamines, PDEI
Four drugs that do not have + inotropic effects:
ACEI/ARBs, BB, diuretics, direct vasodilators
This drug class and prototype drug is potent and highly selective inhibitors of Na/K ATPase (Na pump). They increase the Ca-i which increases myocardial contraction and therefore CO.
Digitalis glycosides; digoxin
Glycosides increase _____ which decreases HR and O2 demand.
Vagal activity
Digoxin works by _____ the driving force for the Na/Ca exchanger so there is decreased ______ of Ca to the ECF.
Decreasing; extrusion
Therapeutic and toxic levels of digoxin:
0.5-2ng/ml; > 2
Therapeutic and toxic levels of digitoxin:
10-25 ng/ml; > 35
Glycosides have a _____ therapeutic window (50%).
narrow
Toxic effects of glycosides are oscillatory ______ and ____.
After depolarization; VT
CNS/vagal s/s of toxic OD of glycosides:
N/V, blurred vision
Catecholamines such as dopamine and dobutamine work by:
activate B1R--> increased Ca influx--> enhanced contractility
Inhibits PDE in cardiac and smooth muscle cells. Increases cAMP which increases Ca influx and contractility, and also inhibits myosin LCK in smooth muscle to cause vasodilation.
Milrinone
Milrinone is a weak _______. Mainly works as a ______.
Positive inotrope; vasodilation
Milrinone also:
Bronchodilates
Milrinone has a long term higher mortality than:
cardiac glycosides
Adverse effects: 12% life threatening ventricular arrhythmias, 3% H/A and hypotension.
PDEI
PDEI prevent ______ of cAMP which ____ the action of protein kinase which ______ the Ca channel.
Hydrolysis; prolongs; phosphorylates
DOC in HF, esp in combo with cardiac glycosides.
ACEI
Decreases AngII concentration which decreases TPR and ____. Also decreases Na retention which decreases _____. decreases sympathetic activity and long term _____ of the heart. Decreases both mortality and morbidity.
Afterload, preload, remodeling
This drug class is indicated for: a pt that has DOE but no symptoms of volume overload; any LV failure; immediately after MI.
ACEI
ACEI can cause severe hypotension especially in ______.
Hypovolemia
Hyperkalemia can be caused by both:
ACEI and ARBs
MOA is similar to ACEI except they bind Ang type 1 R to block the role of Ang II. Name the drug class and prototype drug.
ARBs, losarton
Efficient in reducing the symptoms of HF and slowing its progression. Used in combo and rarely alone to slow the HR and decrease BP and reduce the workload of the heart. Name the drug class and prototype drugs.
B-adrenergic blockers; metoprolol (B1 selective) and labetalol/carvedilol (blocks alpha and beta receptors)
Has the adverse effect of negative inotropic action which can worsen heart failure and cause decreased CO and hypotension.
BB
Do not use BB if there is significant ____ or _____ HF.
Bradycardia; unstable