Change in atrial flutter wave morphology-insight into the sources of electrocardiographic variants in common atrial flutter.
Whether the activation sequence of the right or left atrium plays a role in the morphology of the flutter wave in common atrial flutter is not completely understood. We present two patients with common counterclockwise atrial flutter in whom changes in the left atrial activation sequence produced significant changes in flutter wave polarity (+ to - and - to -/+ biphasic) without a change in the activation sequence within the right atrium. These cases highlight the possible role of alterations of the interatrial connections in the genesis of atypical manifestations of common atrial flutter.
Ashino
Sonoko
S
Department of Cardiovascular Disease, Nihon University School of Medicine, 30-1 Oyaguchi-Kami, Itabashi-Ku, Tokyo 173-8610, Japan.
Watanabe
Ichiro
I
Okumura
Yasuo
Y
Okubo
Kimie
K
Saito
Satoshi
S
D000368:Aged; D001282:Atrial Flutter / Q000503:physiopathology* / Q000601:surgery*; D002304:Cardiac Pacing, Artificial; D017115:Catheter Ablation / Q000379:methods*; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged