Prolongation of Activation‐Recovery Interval over a Preexcited Region before and after Catheter Ablation in Patients with Wolff‐Parkinson‐White Syndrome
Identifieur interne : 001A30 ( Main/Exploration ); précédent : 001A29; suivant : 001A31Prolongation of Activation‐Recovery Interval over a Preexcited Region before and after Catheter Ablation in Patients with Wolff‐Parkinson‐White Syndrome
Auteurs : Yasuya Inden [Japon] ; Makoto Hirai [Japon] ; Yasunobu Takada [Japon] ; Atsuya Shimizu [Japon] ; Keiko Shimokata [Japon] ; Yukihiko Yoshida [Japon] ; Makoto Akahoshi [Japon] ; Takahisa Kondo [Japon] ; Hidehiko Saito [Japon]Source :
- Journal of Cardiovascular Electrophysiology [ 1045-3873 ] ; 2001-08.
English descriptors
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Abstract
Activation‐Recovery Interval in WPW Syndrome. Introduction: Preexisting changes in repolarization properties play an important role in T wave abnormalities (cardiac memory) after ablation in patients with Wolff‐Parkinson‐White (WPW) syndrome. However, no report has provided direct evidence for prolongation of action potential duration (APD) over a preexcited region before and after ablation. Methods and Results: We studied 10 patients with ventricular preexcitation due to a left‐sided accessory pathway (AP) (group M) and 12 patients with concealed left‐sided AP (group C) to clarify prolongation of APD using activation‐recovery intervals (ARIs) from epicardial and endocardial unipolar electrograms in patients with WPW syndrome. ARI was calculated from unipolar electrograms at the His bundle and the coronary sinus adjacent to the AP during atrial pacing (100 beats/min) before and 30 minutes after ablation. Before ablation, ARIs at the AP site were significantly longer in group M than in group C (255 ± 21 msec vs 211 ± 24 msec; P < 0.01), whereas ARIs at the His bundle did not differ between the two groups (255 ± 20 msec vs 245 ± 27 msec; P = NS). After ablation, group M showed no significant changes in ARIs at the AP and His bundle (256 ± 19 msec and 253 ± 15 msec) compared with before ablation. Conclusion: We found by direct analysis of ARIs from the epicardium that APD prolongation over the preexcited region was present before catheter ablation and persisted after catheter ablation. The gradual changes in repolarization properties, including APD prolongation after discontinuation of AP, may be one mechanism of cardiac memory after catheter ablation in patients with WPW syndrome.
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DOI: 10.1046/j.1540-8167.2001.00939.x
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memory</term><term>catheter ablation</term><term>electrocardiography</term><term>wolff‐parkinson‐white syndrome</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Activation‐Recovery Interval in WPW Syndrome. Introduction: Preexisting changes in repolarization properties play an important role in T wave abnormalities (cardiac memory) after ablation in patients with Wolff‐Parkinson‐White (WPW) syndrome. However, no report has provided direct evidence for prolongation of action potential duration (APD) over a preexcited region before and after ablation. Methods and Results: We studied 10 patients with ventricular preexcitation due to a left‐sided accessory pathway (AP) (group M) and 12 patients with concealed left‐sided AP (group C) to clarify prolongation of APD using activation‐recovery intervals (ARIs) from epicardial and endocardial unipolar electrograms in patients with WPW syndrome. ARI was calculated from unipolar electrograms at the His bundle and the coronary sinus adjacent to the AP during atrial pacing (100 beats/min) before and 30 minutes after ablation. Before ablation, ARIs at the AP site were significantly longer in group M than in group C (255 ± 21 msec vs 211 ± 24 msec; P < 0.01), whereas ARIs at the His bundle did not differ between the two groups (255 ± 20 msec vs 245 ± 27 msec; P = NS). After ablation, group M showed no significant changes in ARIs at the AP and His bundle (256 ± 19 msec and 253 ± 15 msec) compared with before ablation. Conclusion: We found by direct analysis of ARIs from the epicardium that APD prolongation over the preexcited region was present before catheter ablation and persisted after catheter ablation. The gradual changes in repolarization properties, including APD prolongation after discontinuation of AP, may be one mechanism of cardiac memory after catheter ablation in patients with WPW syndrome.</div></front></TEI><affiliations><list><country><li>Japon</li></country></list><tree><country name="Japon"><noRegion><name sortKey="Inden, Yasuya" sort="Inden, Yasuya" uniqKey="Inden Y" first="Yasuya" last="Inden">Yasuya Inden</name></noRegion><name sortKey="Akahoshi, Makoto" sort="Akahoshi, Makoto" uniqKey="Akahoshi M" first="Makoto" last="Akahoshi">Makoto Akahoshi</name><name sortKey="Hirai, Makoto" sort="Hirai, Makoto" uniqKey="Hirai M" first="Makoto" last="Hirai">Makoto Hirai</name><name sortKey="Kondo, Takahisa" sort="Kondo, Takahisa" uniqKey="Kondo T" first="Takahisa" last="Kondo">Takahisa Kondo</name><name sortKey="Saito, Hidehiko" sort="Saito, Hidehiko" uniqKey="Saito H" first="Hidehiko" last="Saito">Hidehiko Saito</name><name sortKey="Shimizu, Atsuya" sort="Shimizu, Atsuya" uniqKey="Shimizu A" first="Atsuya" last="Shimizu">Atsuya Shimizu</name><name sortKey="Shimokata, Keiko" sort="Shimokata, Keiko" uniqKey="Shimokata K" first="Keiko" last="Shimokata">Keiko Shimokata</name><name sortKey="Takada, Yasunobu" sort="Takada, Yasunobu" uniqKey="Takada Y" first="Yasunobu" last="Takada">Yasunobu Takada</name><name sortKey="Yoshida, Yukihiko" sort="Yoshida, Yukihiko" uniqKey="Yoshida Y" first="Yukihiko" last="Yoshida">Yukihiko Yoshida</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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