Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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
|