title: Interatrial mechanical dyssynchrony shown by tissue doppler imaging during atrial flutter.
abstract: Although regular supraventricular tachycardia is traditionally classified on the basis of P-wave morphology, diagnostic accuracy is limited to information obtained from surface electrocardiography. Intracardiac electrophysiology is a conclusive although invasive diagnostic method. We report a case of regular supraventricular tachycardia with a heart rate of 162 bpm. M-mode echocardiography of the interatrial septum clarified both the atrial rate and the ventricular response ratio. Tissue Doppler M-mode imaging demonstrated the delay between the posterior wall motion of the left and right atrium. Although it deserves further study, transthoracic echocardiography may provide useful information in addition to electrocardiography.
authors.affiliation: Division of Cardiology, Cardiovascular Center, Sendai Kousei Hospital, Sendai, Miyagi, Japan.
authors.forename: Shumpei
authors.initials: S
authors.lastname: Mori
authors.forename: Norio
authors.initials: N
authors.lastname: Tada
authors.forename: Mie
authors.initials: M
authors.lastname: Sakurai
authors.forename: Kenji
authors.initials: K
authors.lastname: Suzuki
authors.forename: Kaname
authors.initials: K
authors.lastname: Takizawa
authors.forename: Tatsushi
authors.initials: T
authors.lastname: Ootomo
authors.forename: Mikio
authors.initials: M
authors.lastname: Mitsuoka
authors.forename: Yuuko
authors.initials: Y
authors.lastname: Ito
authors.forename: Naoto
authors.initials: N
authors.lastname: Inoue
authors.forename: Taiichiro
authors.initials: T
authors.lastname: Meguro
mesh_terms: D000368:Aged; D001282:Atrial Flutter / Q000150:complications / Q000000981:diagnostic imaging* / Q000503:physiopathology; D015150:Echocardiography, Doppler; D004562:Electrocardiography; D006325:Heart Atria / Q000000981:diagnostic imaging; D006339:Heart Rate; D006801:Humans; D008297:Male; D013617:Tachycardia, Supraventricular / Q000150:complications / Q000000981:diagnostic imaging* / Q000503:physiopathology