ocr: Resi dent and Staff Physici an Patient Education Chart Arrhythmias: Paroxysmal Tachycardia - - : Xhhyh Ectopic pacemaker in the AV node, atria, or ventricles Rapid pulse of 150 to 250 beats per minute * Starts and stops suddenly Reprinted with permissionifomResident and: Staff Physician (c)1991-92, 19931 by Romaine Pierson Publishers, Inc.