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Representative ECGs showing the observed arrhythmias recorded using a RM 6240B/C biological signal recorder system; II lead, 50 mm/sec, 20 mm/mV. (A) Normal ECG; (B) ventricular premature beat; (C) ventricular premature beats-bigeminies; (D) ventricular premature beats-trigeminies; (E) ventricular tachycardia; and (F) ventricular fibrillation. ECG, electrocardiogram.
