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 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.
Correct Answer is B
Explanation
Choice A rationale
Peripheral edema is more commonly associated with right-sided heart failure rather than left-sided. This is because right-sided heart failure leads to systemic venous congestion, causing fluid to accumulate in the peripheral tissues, particularly in the legs and ankles.
Choice B rationale
Pulmonary edema is a major concern in left-sided heart failure due to the inability of the left ventricle to effectively pump blood out to the systemic circulation. This results in blood backing up into the pulmonary veins, leading to fluid accumulation in the lungs.
Choice C rationale
Liver edema, or hepatomegaly, is more typically seen in right-sided heart failure, where the failure of the right ventricle causes blood to back up into the systemic circulation, affecting the liver and other organs.
Choice D rationale
Abdominal edema, or ascites, is also more associated with right-sided heart failure. This condition occurs due to increased pressure in the veins and capillaries, leading to fluid leakage into the abdominal cavity.
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