Labels:text | screenshot OCR: Resident and Staff Physician Patient Education Chart 0 Arrhythmias: Atrial Fibrillation whitebelt * Atria have no coordinated contractions * Many stimuli produce twiching, which appears as small, irregular waves Reprinted with permission from Resident and Staff Physician (c) 1991-92, 1993 by Romaine Pierson Publishers, Inc.