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The nurse is caring for a patient who is in the recovery room following the implantation of an ICD. The patient has developed ventricular tachycardia (VT). What should the nurse assess and document?
- A. ECG to compare time of onset of VT and onset of devices shock
- B. ECG so physician can see what type of dysrhythmia the patient has
- C. Patients level of consciousness (LOC) at the time of the dysrhythmia
- D. Patients activity at time of dysrhythmia
Correct Answer: A
Rationale: If the patient has an ICD implanted and develops VT or ventricular fibrillation, the ECG should be recorded to note the time between the onset of the dysrhythmia and the onset of the devices shock or antitachycardia pacing. This is a priority over LOC or activity at the time of onset.
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A patient calls his cardiologists office and talks to the nurse. He is concerned because he feels he is being defibrillated too often. The nurse tells the patient to come to the office to be evaluated because the nurse knows that the most frequent complication of ICD therapy is what?
- A. Infection
- B. Failure to capture
- C. Premature battery depletion
- D. Oversensing of dysrhythmias
Correct Answer: D
Rationale: Inappropriate delivery of ICD therapy, usually due to oversensing of atrial and sinus tachycardias with a rapid ventricular rate response, is the most frequent complication of ICD. Infections, failure to capture, and premature battery failure are less common.
New nurses on the telemetry unit have been paired with preceptors. One new nurse asks her preceptor to explain depolarization. What would be the best answer by the preceptor?
- A. Depolarization is the mechanical contraction of the heart muscles.
- B. Depolarization is the electrical stimulation of the heart muscles.
- C. Depolarization is the electrical relaxation of the heart muscles.
- D. Depolarization is the mechanical relaxation of the heart muscles.
Correct Answer: B
Rationale: The electrical stimulation of the heart is called depolarization, and the mechanical contraction is called systole. Electrical relaxation is called repolarization, and mechanical relaxation is called diastole.
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.
Following cardiac resuscitation, a patient has been placed in a state of mild hypothermia before being transferred to the cardiac intensive care unit. The nurses assessment reveals that the patient is experiencing neuromuscular paralysis. How should the nurse best respond?
- A. Administer hypertonic IV solution.
- B. Administer a bolus of warmed normal saline.
- C. Reassess the patient in 15 minutes.
- D. Document this as an expected assessment finding.
Correct Answer: D
Rationale: The nurse caring for a patient with hypothermia (passive or induced) needs to monitor for appropriate level of cooling, sedation, and neuromuscular paralysis to prevent seizures; myoclonus; and shivering. Neuromuscular paralysis is an expected finding and does not necessitate further interventions.
A patient has returned to the cardiac care unit after having a permanent pacemaker implantation. For which potential complication should the nurse most closely assess this patient?
- A. Chest pain
- B. Bleeding at the implantation site
- C. Malignant hyperthermia
- D. Bradycardia
Correct Answer: B
Rationale: Bleeding, hematomas, local infections, perforation of the myocardium, and tachycardia are complications of pacemaker implantations. The nurse should monitor for chest pain and bradycardia, but bleeding is a more common immediate complication. Malignant hyperthermia is unlikely because it is a response to anesthesia administration.