When the nurse administers a beta-adrenergic blocker to a patient with angina the nurse expects the drugs will help to control angina, but it also has what other effects?
Decreased urinary output.
Decreased strength of heart muscle contraction.
Increased heart rate.
Increased oxygen consumption.
The Correct Answer is B
Choice A rationale
Beta-adrenergic blockers generally do not decrease urinary output. These drugs primarily act on the cardiovascular system by blocking beta-adrenergic receptors, which results in lowered heart rate and blood pressure. Their effects are less pronounced on the renal system unless specific agents with renal effects are used.
Choice B rationale
Beta-adrenergic blockers decrease the strength of heart muscle contraction (negative inotropic effect). By blocking beta receptors, they inhibit the stimulatory effects of catecholamines on the heart, reducing the force of myocardial contraction, which helps decrease oxygen demand and control angina symptoms.
Choice C rationale
Beta-adrenergic blockers typically decrease heart rate (negative chronotropic effect) rather than increase it. They inhibit beta-adrenergic receptors, which leads to a slower heart rate and can help manage conditions like angina by reducing myocardial oxygen consumption.
Choice D rationale
Beta-adrenergic blockers decrease oxygen consumption by reducing heart rate and the force of contraction. These effects lower myocardial oxygen demand, which is beneficial for patients with angina by preventing episodes triggered by increased oxygen needs.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Calcium and magnesium imbalances are less likely to influence Digoxin's effects compared to potassium and magnesium.
Choice B rationale
While chloride levels are important, potassium is more critical due to its significant impact on Digoxin’s action.
Choice C rationale
Correct, potassium and magnesium levels are crucial as imbalances can potentiate Digoxin toxicity or reduce its efficacy.
Choice D rationale
Sodium and calcium imbalances are less directly related to Digoxin efficacy compared to potassium and magnesium.
Correct Answer is C
Explanation
Choice A rationale
Monitoring the weekly pulse is not sufficient for managing ventricular arrhythmias at home. Continuous or daily monitoring of vital parameters is more effective.
Choice B rationale
Monitoring daily fluid intake is essential for overall health but not directly related to the management of ventricular arrhythmias with propranolol (Inderal).
Choice C rationale
Daily blood pressure monitoring is crucial for patients on propranolol, as this medication can significantly lower blood pressure, and tracking it helps prevent hypotension.
Choice D rationale
Weekly weight monitoring is important for patients with heart conditions, but daily monitoring of blood pressure is more directly related to the management of ventricular arrhythmias with propranolol.
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