In contrast to an automated implanted cardioverter/defibrillator, an internal cardiac pacemaker:
A. regulates the patient's heart rate if it falls below a preset value.
B. delivers a shock to the heart if the rate becomes exceedingly fast.
C. is implanted under the skin in the left upper abdominal quadrant.
D. will only activate if it detects rhythms such as ventricular fibrillation.
Answer: A. regulates the patient's heart rate if it falls below a preset value.
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