Noninvasive Localization of Accessory Pathways in Wolff-Parkinson-White Syndrome by Three-Dimensional Speckle Tracking Echocardiography.
We have developed a noninvasive isochrone activation imaging (AI) system with 3-dimensional (3D) speckle tracking echocardiography (STE), which allows visualization of the wavefront image of mechanical propagation of the accessory pathway (ACP) in Wolff-Parkinson-White syndrome.



Patients with manifest Wolff-Parkinson-White syndrome were imaged in 3D-STE AI mode, which quantified the time from QRS onset to regional endocardial deformation. In 2 patients with left- and right-side ACP, we confirmed that intraoperative contact endocardial electric mapping and the 3D-STE AI system showed comparable images pre- and postablation. In normal heart assessment by 3D-echo AI, the earliest activation sites were found at the attachment of the papillary muscles in the left ventricle and midseptum in the right ventricle, and none showed earliest activation at the peri-atrioventricular valve annuli. An analyzer who was unaware of the clinical information assessed 39 ACP locations in 38 Wolff-Parkinson-White syndrome patients using 3D-STE. All showed abnormal perimitral or tricuspid annular activations, and the location of 34 ACP (87%) showed agreement with the successful ablation sites within a 2-o'clock range. Especially for left free wall ACP, 17/18 (94%) showed consistency with the ablation site within a 2 o'clock range. Among 15 ACP at the ventricular septum, 9 (60%) showed early local activation in both right and left sides of the septum.



Isochrone AI with 3D-STE may be a promising noninvasive imaging tool to assess cardiac synchronized activation in normal hearts and detect abnormal breakthrough of mechanical activation from both atrioventricular annuli in Wolff-Parkinson-White syndrome.
From the Department of Clinical Laboratory Medicine, Faculty of Medicine (T.I., Y.K.) and Cardiovascular Division, Faculty of Medicine (Y.Seo, M.I., Y.Sekiguchi, K.O., K.K., T.M.-O., M.Y., A.N., K.A.), University of Tsukuba, Japan. tomoco@md.tsukuba.ac.jp.
Tomoko
T
Ishizu
From the Department of Clinical Laboratory Medicine, Faculty of Medicine (T.I., Y.K.) and Cardiovascular Division, Faculty of Medicine (Y.Seo, M.I., Y.Sekiguchi, K.O., K.K., T.M.-O., M.Y., A.N., K.A.), University of Tsukuba, Japan.
Yoshihiro
Y
Seo
From the Department of Clinical Laboratory Medicine, Faculty of Medicine (T.I., Y.K.) and Cardiovascular Division, Faculty of Medicine (Y.Seo, M.I., Y.Sekiguchi, K.O., K.K., T.M.-O., M.Y., A.N., K.A.), University of Tsukuba, Japan.
Miyako
M
Igarashi
From the Department of Clinical Laboratory Medicine, Faculty of Medicine (T.I., Y.K.) and Cardiovascular Division, Faculty of Medicine (Y.Seo, M.I., Y.Sekiguchi, K.O., K.K., T.M.-O., M.Y., A.N., K.A.), University of Tsukuba, Japan.
Yukio
Y
Sekiguchi
From the Department of Clinical Laboratory Medicine, Faculty of Medicine (T.I., Y.K.) and Cardiovascular Division, Faculty of Medicine (Y.Seo, M.I., Y.Sekiguchi, K.O., K.K., T.M.-O., M.Y., A.N., K.A.), University of Tsukuba, Japan.
Tomoko
T
Machino-Ohtsuka
From the Department of Clinical Laboratory Medicine, Faculty of Medicine (T.I., Y.K.) and Cardiovascular Division, Faculty of Medicine (Y.Seo, M.I., Y.Sekiguchi, K.O., K.K., T.M.-O., M.Y., A.N., K.A.), University of Tsukuba, Japan.
Kojiro
K
Ogawa
From the Department of Clinical Laboratory Medicine, Faculty of Medicine (T.I., Y.K.) and Cardiovascular Division, Faculty of Medicine (Y.Seo, M.I., Y.Sekiguchi, K.O., K.K., T.M.-O., M.Y., A.N., K.A.), University of Tsukuba, Japan.
Kenji
K
Kuroki
From the Department of Clinical Laboratory Medicine, Faculty of Medicine (T.I., Y.K.) and Cardiovascular Division, Faculty of Medicine (Y.Seo, M.I., Y.Sekiguchi, K.O., K.K., T.M.-O., M.Y., A.N., K.A.), University of Tsukuba, Japan.
Masahiro
M
Yamamoto
From the Department of Clinical Laboratory Medicine, Faculty of Medicine (T.I., Y.K.) and Cardiovascular Division, Faculty of Medicine (Y.Seo, M.I., Y.Sekiguchi, K.O., K.K., T.M.-O., M.Y., A.N., K.A.), University of Tsukuba, Japan.
Akihiko
A
Nogami
From the Department of Clinical Laboratory Medicine, Faculty of Medicine (T.I., Y.K.) and Cardiovascular Division, Faculty of Medicine (Y.Seo, M.I., Y.Sekiguchi, K.O., K.K., T.M.-O., M.Y., A.N., K.A.), University of Tsukuba, Japan.
Yasushi
Y
Kawakami
From the Department of Clinical Laboratory Medicine, Faculty of Medicine (T.I., Y.K.) and Cardiovascular Division, Faculty of Medicine (Y.Seo, M.I., Y.Sekiguchi, K.O., K.K., T.M.-O., M.Y., A.N., K.A.), University of Tsukuba, Japan.
Kazutaka
K
Aonuma
D058606:Accessory Atrioventricular Bundle / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery; D000200:Action Potentials; D000293:Adolescent; D000328:Adult; D000368:Aged; D017115:Catheter Ablation; D002648:Child; D019560:Echocardiography, Three-Dimensional / Q000379:methods*; D004562:Electrocardiography; D022062:Electrophysiologic Techniques, Cardiac; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D013997:Time Factors; D016896:Treatment Outcome; D016277:Ventricular Function, Left; D016278:Ventricular Function, Right; D014927:Wolff-Parkinson-White Syndrome / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery
Wolff–Parkinson–White syndrome; echocardiography, 3-dimensional; isochrone imaging; speckle tracking echocardiography