Cardiac cells can withstand ischemic conditions for 20 minutes before irreversible cell injury occurs:

True

False

Answer and Explanation

The Correct Answer is A

Choice A reason:

True is the correct answer. Cardiac cells can endure ischemic conditions for approximately 20 minutes before irreversible injury occurs. Beyond this period, the lack of oxygen and nutrients leads to cell death and permanent damage to the heart tissue. This understanding is crucial in acute cardiac care, where timely intervention can prevent irreversible damage.

Choice B reason:

False is incorrect because it does not align with the known tolerance period of cardiac cells to ischemic conditions. The 20-minute window is critical for initiating interventions that can save heart tissue from permanent damage.

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Correct Answer is A

Explanation

Choice A reason:
Taking an antacid one hour after ranitidine is recommended because antacids can affect the absorption of H2 receptor blockers like ranitidine. Ranitidine works by reducing stomach acid production, whereas antacids neutralize existing acid. Taking the antacid too close to the ranitidine can reduce the effectiveness of the ranitidine by altering the stomach's pH balance and affecting its absorption.

Choice B reason:
Taking an antacid and ranitidine at the same time does not enhance their effect. In fact, this can interfere with the absorption and effectiveness of ranitidine. Antacids can increase the pH of the stomach, which may reduce the absorption of ranitidine, thus diminishing its acid-reducing effects.

Choice C reason:
Taking both medications at the same time before meals is not advisable for the same reason as above. The simultaneous administration can reduce the effectiveness of ranitidine, as the increased pH caused by the antacid can interfere with the absorption of the H2 receptor blocker, thereby not providing the intended therapeutic effect.

Choice D reason:
The patient can take both medications, but they should be timed correctly to ensure optimal effectiveness. Saying that the patient needs to be on one medication only is incorrect. Both medications can be used together, but the antacid should be taken after ranitidine to avoid any interaction that might impair the effectiveness of ranitidine.

A. You should maintain a healthy lifestyle and avoid high-fat foods. B. Muscle pain is not concerning with statin use. C. Statins reduce the risk of coronary events in people with diabetes and slightly elevated LDL levels. D. Statin use can cause GI side effects.

Correct Answer is B

Explanation

Choice A reason:
Maintaining a healthy lifestyle and avoiding high-fat foods is appropriate advice. Statins are more effective when combined with a healthy diet and lifestyle. This helps in managing cholesterol levels and reducing the risk of cardiovascular events.

Choice B reason:
The statement that muscle pain is not concerning with statin use is inappropriate. Muscle pain can be a significant side effect of statins, known as myopathy, and in rare cases, it can lead to a more severe condition called rhabdomyolysis. Patients experiencing muscle pain should report it to their healthcare provider for evaluation and management.

Choice C reason:
Statins do reduce the risk of coronary events in people with diabetes and slightly elevated LDL levels. This is well-documented and an appropriate part of patient education, as statins are beneficial in preventing cardiovascular events in at-risk populations.

Choice D reason:
Statin use can cause gastrointestinal (GI) side effects, including nausea, constipation, and diarrhea. This information should be part of patient education so that patients are aware of potential side effects and can manage them appropriately.

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Cardiac cells can withstand ischemic conditions for 20 minutes before irreversible cell injury occurs:

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The nurse is providing education to a patient who has been prescribed both an antacid and ranitidine (an H2 receptor blocker). Which instruction should the nurse give the patient about taking the medications?

Correct Answer is A

Explanation

A patient has begun taking an HMG-COA reductase inhibitor (statins). Which statement about this class of drugs made by the nurse during patient education would be inappropriate?

Correct Answer is B

Explanation

Which plasma lipoprotein level is most concerning when considering the risk of coronary atherosclerosis?

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