Arrhythmias, Cardiac [Disease/Finding] Atrial Flutter [Disease/Finding] 5370000 C1194 Auricular Flutter M0001927 Atrial Flutter C0004239 985206 Rapid, irregular atrial contractions caused by a block of electrical impulse conduction in the right atrium and a reentrant wave front traveling up the inter-atrial septum and down the right atrial free wall or vice versa. Unlike ATRIAL FIBRILLATION which is caused by abnormal impulse generation, typical atrial flutter is caused by abnormal impulse conduction. As in atrial fibrillation, patients with atrial flutter cannot effectively pump blood into the lower chambers of the heart (HEART VENTRICLES). Atrial Flutter N0000000508 D001282