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Preoperative education is an important part of the nursing care of patients having coronary artery revascularization. When explaining the pre- and postoperative regimens, the nurse would be sure to include education about which subject?
- A. Symptoms of hypovolemia
- B. Symptoms of low blood pressure
- C. Complications requiring graft removal
- D. Intubation and mechanical ventilation
Correct Answer: D
Rationale: Most patients remain intubated and on mechanical ventilation for several hours after surgery. It is important that patients realize that this will prevent them from talking, and the nurse should reassure them that the staff will be able to assist them with other means of communication. Teaching would generally not include symptoms of low blood pressure or hypovolemia, as these are not applicable to most patients. Teaching would also generally not include rare complications that would require graft removal.
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The nurse is participating in the care conference for a patient with ACS. What goal should guide the care teams selection of assessments, interventions, and treatments?
- A. Maximizing cardiac output while minimizing heart rate
- B. Decreasing energy expenditure of the myocardium
- C. Balancing myocardial oxygen supply with demand
- D. Increasing the size of the myocardial muscle
Correct Answer: C
Rationale: Balancing myocardial oxygen supply with demand (e.g., as evidenced by the relief of chest pain) is the top priority in the care of the patient with ACS. Treatment is not aimed directly at minimizing heart rate because some patients experience bradycardia. Increasing the size of the myocardium is never a goal. Reducing the myocardiums energy expenditure is often beneficial, but this must be balanced with productivity.
A patient presents to the walk-in clinic complaining of intermittent chest pain on exertion, which is eventually attributed to angina. The nurse should inform the patient that angina is most often attributable to what cause?
- A. Decreased cardiac output
- B. Decreased cardiac contractility
- C. Infarction of the myocardium
- D. Coronary arteriosclerosis
Correct Answer: D
Rationale: In most cases, angina pectoris is due to arteriosclerosis. The disease is not a result of impaired cardiac output or contractility. Infarction may result from untreated angina, but it is not a cause of the disease.
The nurse is working with a patient who had an MI and is now active in rehabilitation. The nurse should teach this patient to cease activity if which of the following occurs?
- A. The patient experiences chest pain, palpitations, or dyspnea
- B. The patient experiences a noticeable increase in heart rate during activity
- C. The patients oxygen saturation level drops below 96%
- D. The patients respiratory rate exceeds 30 breaths/min
Correct Answer: A
Rationale: Any activity or exercise that causes dyspnea and chest pain should be stopped in the patient with CAD. Heart rate must not exceed the target rate, but an increase above resting rate is expected and is therapeutic. In most patients, a respiratory rate that exceeds 30 breaths/min is not problematic. Similarly, oxygen saturation slightly below 96% does not necessitate cessation of activity.
Family members bring a patient to the ED with pale cool skin, sudden midsternal chest pain unrelieved with rest, and a history of CAD. How should the nurse best interpret these initial data?
- A. The symptoms indicate angina and should be treated as such
- B. The symptoms indicate a pulmonary etiology rather than a cardiac etiology
- C. The symptoms indicate an acute coronary episode and should be treated as such
- D. Treatment should be determined pending the results of an exercise stress test
Correct Answer: C
Rationale: Angina and MI have similar symptoms and are considered the same process, but are on different points along a continuum. That the patients symptoms are unrelieved by rest suggests an acute coronary episode rather than angina. Pale cool skin and sudden onset are inconsistent with a pulmonary etiology. Treatment should be initiated immediately regardless of diagnosis.
The nurse is providing care for a patient with high cholesterol and triglyceride values. In teaching the patient about therapeutic lifestyle changes such as diet and exercise, the nurse realizes that the desired goal for cholesterol levels is which of the following?
- A. High HDL values and high triglyceride values
- B. Absence of detectable total cholesterol levels
- C. Elevated blood lipids, fasting glucose less than 100
- D. Low LDL values and high HDL values
Correct Answer: D
Rationale: The desired goal for cholesterol readings is for a patient to have low LDL and high HDL values. LDL exerts a harmful effect on the coronary vasculature because the small LDL particles can be easily transported into the vessel lining. In contrast, HDL promotes the use of total cholesterol by transporting LDL to the liver, where it is excreted. Elevated triglycerides are also a major risk factor for cardiovascular disease. A goal is also to keep triglyceride levels less than 150 mg/dL. All individuals possess detectable levels of total cholesterol.