Nokea
During a physical examination of a patient, the nurse palpates the point of maximal impulse (PMI) in the sixth intercostal space lateral to the left midclavicular line. Which of the following actions should the nurse implement next?
- A. Document that the PMI is in the normal anatomic location.
- B. Ask the patient about risk factors for coronary artery disease.
- C. Auscultate both the carotid arteries for the presence of a bruit.
- D. Assess the patient for symptoms of left ventricular hypertrophy.
Correct Answer: D
Rationale: The PMI should be felt at the intersection of the 5th intercostal space and the left midclavicular line. A PMI located outside these landmarks indicates possible cardiac enlargement, such as with left ventricular hypertrophy. Cardiac enlargement is not necessarily associated with coronary or carotid artery disease.
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The nurse is reviewing the 12-lead electrocardiogram (ECG) of a healthy older-adult patient who is having an annual physical examination. Which of the following findings should be of most concern to the nurse?
- A. The heart rate is 43 beats/minute.
- B. The PR interval is 0.21 seconds.
- C. There is a right bundle-branch block.
- D. The QRS duration is 0.13 seconds.
Correct Answer: A
Rationale: The resting supine HR is not markedly affected with aging, so the decrease in HR requires further investigation. Bundle-branch block and slight increases in PR interval or QRS duration are common in older individuals because of increases in conduction time through the AV node, the bundle of His, and the bundle branches.
Which of the following actions should the nurse implement for a patient who arrives for a calcium-scoring CT scan?
- A. Administer oral sedative medications.
- B. Teach the patient about the procedure.
- C. Ask whether the patient has eaten today.
- D. Insert a large gauge intravenous catheter.
Correct Answer: B
Rationale: The nurse will need to teach the patient that the procedure is rapid and involves little risk. The other actions are not necessary.
The nurse is providing teaching to a patient being evaluated for rhythm disturbances with a Holter monitor. Which of the following information should the nurse include in the teaching plan?
- A. Exercise more than usual while the monitor is in place.
- B. Remove the electrodes when taking a shower or tub bath.
- C. Keep a diary of daily activities while the monitor is worn.
- D. Connect the recorder to a telephone transmitter once daily.
Correct Answer: C
Rationale: The patient is instructed to keep a diary describing daily activities while Holter monitoring is being accomplished to help correlate any rhythm disturbances with patient activities. Patients are taught that they should not take a shower or bath during Holter monitoring and that they should continue with their usual daily activities. The recorder stores the information about the patient's rhythm until the end of the testing, when it is removed and the data are analyzed.
The nurse is assessing the laboratory results for a patient who developed chest pain 4 hours ago and may be having a myocardial infarction. Which of the following laboratory results is most important for the nurse to review?
- A. LDL cholesterol
- B. Troponins T and I
- C. C-reactive protein
- D. Creatine kinase-MB (CK-MB)
Correct Answer: B
Rationale: Cardiac troponins start to elevate hours (average 4-6 hours) after myocardial injury and are specific to myocardium. Creatine kinase-MB (CK-MB) is specific to myocardial injury and infarction, but it does not increase until 6 hours after the infarction occurs. LDL cholesterol and C-reactive protein are useful in assessing cardiovascular risk but are not helpful in determining whether a patient is having an acute myocardial infarction.
The nurse is assessing a patient who has just arrived in the emergency department and notes a pulse deficit. Which of the following actions should the nurse anticipate for the patient?
- A. A 2-D echocardiogram
- B. A cardiac catheterization
- C. Hourly blood pressure checks
- D. Electrocardiogram monitoring
Correct Answer: D
Rationale: Pulse deficit is a difference between simultaneously obtained apical and radial pulses and indicates that there may be a cardiac dysrhythmia that would be detected with ECG monitoring. Frequent BP monitoring, cardiac catheterization, and echocardiograms are used for diagnosis of other cardiovascular disorders but would not be as helpful in determining the immediate reason for the pulse deficit.