The nurse obtains a monitor strip on a patient who has had a myocardial infarction and makes the following analysis: P wave not apparent, ventricular rate 162, R-R interval regular, P-R interval not measurable, and QRS complex wide and distorted, QRS duration 0.18 second. The nurse interprets the patient's cardiac rhythm as
A) a. atrial fibrillation.
B) b. sinus tachycardia.
C) c. ventricular fibrillation.
D) d. ventricular tachycardia.