TY - JOUR
T1 - Changes in repolarization properties with long-term cardiac memory modify dispersion of repolarization in patients with Wolff-Parkinson-White syndrome
AU - Takada, Yasunobu
AU - Inden, Yasuya
AU - Akahoshi, Makoto
AU - Shibata, Yoshihisa
AU - Shimizu, Atsuya
AU - Yoshida, Yukihiko
AU - Yamada, Takumi
AU - Tsuboi, Naoya
AU - Hirayama, Haruo
AU - Ito, Teruo
AU - Kondo, Takahisa
AU - Saito, Hidehiko
AU - Hirai, Makoto
PY - 2002
Y1 - 2002
N2 - Introduction: Transient T wave changes after cessation of preexcitation have been attributed to cardiac memory. However, there have been no reports on the effects of long-term cardiac memory on repolarization dispersion before and after catheter ablation in patients with Wolff-Parkinson-White (WPW) syndrome. Methods and Results: We investigated 47 patients with an accessory pathway (AP; 24 manifest left-sided, 14 manifest right-sided, and 9 concealed left-sided). Repolarization dispersion was analyzed by two methods, recovery time (RT) dispersion and newly proposed T wave width (WT), from 87-lead body surface maps before, 1 day after, and 7 days after catheter ablation. RT dispersion and WT were significantly correlated before, 1 day after, and 7 days after catheter ablation (r = 0.78). In patients with preexcitation, RT dispersion and WT increased significantly (P < 0.05) 1 day after catheter ablation (178 ± 32 msec and 172 ± 30 msec) compared with those before (154 ± 24 msec and 156 ± 18 msec) and 7 days after catheter ablation (147 ± 19 msec and 156 ± 16 msec), respectively. However, there were no significant changes in RT dispersion and WT before and after catheter ablation in concealed WPW syndrome. Conclusion: The findings suggest that the abrupt changes in activation sequence increase repolarization dispersion in the presence of previous cardiac memory, and that the dispersion decreases days or weeks after alteration of activation sequence by catheter ablation, with development of new cardiac memory in patients with manifest WPW syndrome.
AB - Introduction: Transient T wave changes after cessation of preexcitation have been attributed to cardiac memory. However, there have been no reports on the effects of long-term cardiac memory on repolarization dispersion before and after catheter ablation in patients with Wolff-Parkinson-White (WPW) syndrome. Methods and Results: We investigated 47 patients with an accessory pathway (AP; 24 manifest left-sided, 14 manifest right-sided, and 9 concealed left-sided). Repolarization dispersion was analyzed by two methods, recovery time (RT) dispersion and newly proposed T wave width (WT), from 87-lead body surface maps before, 1 day after, and 7 days after catheter ablation. RT dispersion and WT were significantly correlated before, 1 day after, and 7 days after catheter ablation (r = 0.78). In patients with preexcitation, RT dispersion and WT increased significantly (P < 0.05) 1 day after catheter ablation (178 ± 32 msec and 172 ± 30 msec) compared with those before (154 ± 24 msec and 156 ± 18 msec) and 7 days after catheter ablation (147 ± 19 msec and 156 ± 16 msec), respectively. However, there were no significant changes in RT dispersion and WT before and after catheter ablation in concealed WPW syndrome. Conclusion: The findings suggest that the abrupt changes in activation sequence increase repolarization dispersion in the presence of previous cardiac memory, and that the dispersion decreases days or weeks after alteration of activation sequence by catheter ablation, with development of new cardiac memory in patients with manifest WPW syndrome.
KW - Ablation
KW - Cardiac memory
KW - Preexcitation
KW - Repolarization dispersion
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U2 - 10.1046/j.1540-8167.2002.00324.x
DO - 10.1046/j.1540-8167.2002.00324.x
M3 - Article
C2 - 12033346
AN - SCOPUS:0036105585
SN - 1045-3873
VL - 13
SP - 324
EP - 330
JO - Journal of cardiovascular electrophysiology
JF - Journal of cardiovascular electrophysiology
IS - 4
ER -