A patient with an implanted cardioversion defibrillator experienced a cardiac arrest and had an external pacemaker inserted. Which of the following will occur with the implanted defibrillator?
1. it will continue to function
2. it will provide a rhythm in conjunction with the external pacemaker
3. it will be removed
4. it is deactivated
4
Rationale: If the implantable cardioversion defibrillator malfunctions, or if the heart does not respond to shocks delivered, life-support measures are initiated. If temporary external pacing is required, the implantable defibrillator is deactivated. The defibrillator will not continue to function if the patient has an external pacemaker nor will it continue to provide a rhythm in conjunction with the external pacemaker. It is not likely that the defibrillator will be removed.
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