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32 Cards in this Set
- Front
- Back
The inability of heart to pump enough blood to meet the need of the body is called heart failure.
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True
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The major goal of pharmacotherapy of heart failure is to enhance cardiac performance including enhancement of myocardial contractility and increase in CO.
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True
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Systemic edema is d/t failure of the LV, and pulmonary edema is d/t failure of RV.
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False
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The ventricular performance curve, a plot of cardiac output against end-diastolic pressure will be up-shifted during chronic heart failure.
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False
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Diuretics decrease sodium/water retention and reduce preload of the heart in treatment of chronic heart failure.
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True
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Digoxin can be used to effectively treat chronic heart failure mainly d/t its action to enhance myocardial contraction and to slow down HR by inhibition of the Na-K ATPase in cardiac myocytes and increase in the vagal activity.
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True
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Increase in intracellular cGMP and consequent Ca concentrations in cardiac myocytes is the major mechanism mediating the action of milrinone, a phosphodiesterase inhibitor, which enhances myocardial contraction.
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False
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The major therapeutic goal of BB during chronic heart failure is to reduce the HR and lower BP that in turn reduces the workload of the heart.
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True
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Which drug group does not decrease the workload of the heart (including preload and afterload) during the tx of chronic heart failure.
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Cardiac glycosides
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Which drug group has a positive inotropic effect?
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Phosphodiesterase inhibitors
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Why is a gradual dose increase suggested as well as monitoring the blood concentrations recommended for cardiac glycosides?
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The dose of these drugs has a narrow therapeutic window
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What feature makes PDEI sometimes referred to as 'inodilators'?
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Producing vasodilation and increasing myocardial contractility
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What mechanism may not mediate the therapeutic action of ACEI on chronic heart failure:
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Increase renin production
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Why must BB be used with caution in tx of chronic heart failure:
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It's negative inotropic action
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What arrhythmia often occurs during use of either cardiac glycosides or PDEI in pts with chronic heart failure?
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VT
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Cardiac glycosides are highly selective inhibitors of Na/K ATPase. What mechanism mediates the increase in myocardial contractility?
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Increase in intracellular Ca level
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Diuretics are used to tx heart failure because of:
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Decrease in preload of the heart
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The therapeutic action of digoxin in tx of chronic heart failure is through:
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Increase in myocardial contractility
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Currently, ACEI are increasingly used for tx of chronic heart failure b/c this group of drugs is capable of:
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Decrease in both preload and afterload of the heart
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As a group of drugs newly developed for tx of chronic heart failure, PDE inhibitors may exert their action by:
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Increase in myocardial contractility and decrease in afterload of the heart
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Weakening of the heart muscle and insufficiency of cardiac performance is:
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CHF
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CHF is does not have a single cause to a disease, but is a ______
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Pathological process
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Medical goals in tx of CHF include:
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Prevention and slowing progression
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Development of CHF is a ________ process.
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Chronic, slow
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In response to low CO, there is increased _____ discharge with increases the CO. In response to decreased RBF, there is increased renin and ANGII which increases_____.
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Sympathetic, BP
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Remodeling leads to:
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Cardiac hypertrophy
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Consequences of uncompensated CHF include : decreased contractility which decreases ______; decreased tissue perfusion and RBF which leads to ______ and Na/H2o reabsorption which leads to edema.
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CO; increased ADH/AngII
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Increased edema in the body leads to increased _____ which increases the _______ of the heart.
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TPR; workload
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If the ventricle is overly stretched, the effect of ventricular contraction is ______ and the CO vs EDVP curve shifts ____.
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Diminished; downward
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Given to decrease PVR and afterload:
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ACEI or ARB
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Give ___ if systolic dysfunction with 3rd heart sound or a fib is present.
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Dig
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Give ___ to pts with stable class II-IV heart failure.
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BB
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