A patient asked the nurse what cardiac glycosides do to improve his condition.
What is the nurse's best response?
They increase heart rate.
They decrease the force of myocardial contractions.
They decrease conduction velocity.
They help renal blood flow and increase urine output.
The Correct Answer is D
Choice A rationale
Cardiac glycosides are not known for increasing heart rate. Instead, they tend to decrease heart rate by enhancing vagal tone and increasing the refractory period of the atrioventricular node, which helps in controlling heart rate, especially in atrial fibrillation.
Choice B rationale
Cardiac glycosides actually increase the force of myocardial contractions. They inhibit the sodium-potassium ATPase pump, which leads to an increase in intracellular sodium and calcium levels in the myocardial cells, thus increasing the force of contraction.
Choice C rationale
Cardiac glycosides do not significantly decrease conduction velocity. They primarily affect the contractility and heart rate but their influence on conduction velocity is relatively mild.
Choice D rationale
Cardiac glycosides improve renal blood flow and increase urine output by increasing the cardiac output and reducing the activation of the renin-angiotensin-aldosterone system. This helps in relieving symptoms of heart failure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
Treatment of narcotic dependence involves using a narcotics antagonist to block the effects of narcotics. This helps prevent relapse in patients recovering from narcotic addiction by decreasing cravings and withdrawal symptoms.
Choice B rationale
Treatment of alcohol dependence does not typically involve narcotics antagonists. Instead, medications like disulfiram or naltrexone are used to manage alcohol dependence.
Choice C rationale
Reversal of tachycardia is not an indication for a narcotics antagonist. Tachycardia is usually managed with medications like beta-blockers or calcium channel blockers.
Choice D rationale
Reversal of bronchoconstriction is not an indicator for narcotics antagonists. Bronchoconstriction is usually treated with bronchodilators such as albuterol or ipratropium.
Correct Answer is D
Explanation
Choice A rationale
Antihistamines can enhance the sedative effects of cyclobenzaprine, increasing the risk of drowsiness and accidents. Patients should avoid combining these medications.
Choice B rationale
Antiemetics are not contraindicated with cyclobenzaprine, although they should be used cautiously due to potential interactions that can increase sedation.
Choice C rationale
Antibiotics do not generally interact significantly with cyclobenzaprine. There are no specific contraindications against their combined use.
Choice D rationale
Alcohol can significantly increase the sedative effects of cyclobenzaprine, leading to enhanced drowsiness, impaired motor functions, and an increased risk of accidents. Patients should avoid alcohol while taking this medication.
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