a. Supraventricular ectopy i. Singlets: > 200 / 24 hours ii. Couplets: > 20 / hour iii. Runs: > 10 beats b. Ventricular ectopy i. Unifocal singlets: > 100 / 24 hours ii. Unifocal couplets: > 20 / hour iii. Complex of multifocal singlets: > 50 / 24 hours iv. Complex of multifocal couplets: > 10 / 24 hours v. Any Run (ventricular tachycardia) c. Heart rate i. < 40 bpm for 1 minute while awake ii. < 35 bpm for 3 minutes while asleep iii. > 120 bpm for 3 minutes (when not exercising) iv. Pauses > 2000 msec d. 2nd or 3rd degree AV block e. Intraventricular conduction delay (IVCD) with QRS duration > 120 msec or right bundle branch block (RBBB) or left buddle branch block (LBBB) other than rare RBBB f. Atrial flutter or atrial fibrillation regardless of rate