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A patient the nurse is caring for has a permanent pacemaker implanted with the identification code beginning with VVI. What does this indicate?
- A. Ventricular paced, ventricular sensed, inhibited
- B. Variable paced, ventricular sensed, inhibited
- C. Ventricular sensed, ventricular situated, implanted
- D. Variable sensed, variable paced, inhibited
Correct Answer: A
Rationale: The identification of VVI indicates ventricular paced, ventricular sensed, inhibited.
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A nurse is caring for a patient who is exhibiting ventricular tachycardia (VT). Because the patient is pulseless, the nurse should prepare for what intervention?
- A. Defibrillation
- B. ECG monitoring
- C. Implantation of a cardioverter defibrillator
- D. Angioplasty
Correct Answer: A
Rationale: Any type of VT in a patient who is unconscious and without a pulse is treated in the same manner as ventricular fibrillation: Immediate defibrillation is the action of choice. ECG monitoring is appropriate, but this is an assessment, not an intervention, and will not resolve the problem. An ICD and angioplasty do not address the dysrhythmia.
An adult patient with third-degree AV block is admitted to the cardiac care unit and placed on continuous cardiac monitoring. What rhythm characteristic will the ECG most likely show?
- A. PP interval and RR interval are irregular.
- B. PP interval is equal to RR interval.
- C. Fewer QRS complexes than P waves
- D. PR interval is constant.
Correct Answer: C
Rationale: In third-degree AV block, no atrial impulse is conducted through the AV node into the ventricles. As a result, there are impulses stimulating the atria and impulses stimulating the ventricles. Therefore, there are more P waves than QRS complexes due to the difference in the natural pacemaker (nodes) rates of the heart. The other listed ECG changes are not consistent with this diagnosis.
The nurse is planning discharge teaching for a patient with a newly inserted permanent pacemaker. What is the priority teaching point for this patient?
- A. Start lifting the arm above the shoulder right away to prevent chest wall adhesion.
- B. Avoid cooking with a microwave oven.
- C. Avoid exposure to high-voltage electrical generators.
- D. Avoid walking through store and library antitheft devices.
Correct Answer: C
Rationale: High-output electrical generators can reprogram pacemakers and should be avoided. Recent pacemaker technology allows patients to safely use most household electronic appliances and devices (e.g., microwave ovens). The affected arm should not be raised above the shoulder for 1 week following placement of the pacemaker. Antitheft alarms may be triggered so patients should be taught to walk through them quickly and avoid standing in or near these devices. These alarms generally do not interfere with pacemaker function.
The nurse is writing a plan of care for a patient with a cardiac dysrhythmia. What would be the most appropriate goal for the patient?
- A. Maintain a resting heart rate below 70 bpm.
- B. Maintain adequate control of chest pain.
- C. Maintain adequate cardiac output.
- D. Maintain normal cardiac structure.
Correct Answer: C
Rationale: For patient safety, the most appropriate goal is to maintain cardiac output to prevent worsening complications as a result of decreased cardiac output. A resting rate of less than 70 bpm is not appropriate for every patient. Chest pain is more closely associated with acute coronary syndrome than with dysrhythmias. Nursing actions cannot normally influence the physical structure of the heart.
A group of nurses are participating in orientation to a telemetry unit. What should the staff educator tell this class about ST segments?
- A. They are the part of an ECG that reflects systole.
- B. They are the part of an ECG used to calculate ventricular rate and rhythm.
- C. They are the part of an ECG that reflects the time from ventricular depolarization through repolarization.
- D. They are the part of an ECG that represents early ventricular repolarization.
Correct Answer: D
Rationale: ST segment is the part of an ECG that reflects the end of the QRS complex to the beginning of the T wave. The part of an ECG that reflects repolarization of the ventricles is the T wave. The part of an ECG used to calculate ventricular rate and rhythm is the RR interval. The part of an ECG that reflects the time from ventricular depolarization through repolarization is the QT interval.