Synonyms:HP:0001715, HP:0005179, Quivering upper heart chambers resulting in irregular heartbeat
Id:HP:0005110
Description:An atrial arrhythmia characterized by disorganized atrial activity without discrete P waves on the surface EKG, but instead by an undulating baseline or more sharply circumscribed atrial deflections of varying amplitude an frequency ranging from 350 to 600 per minute.