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Accession number;01A1010588
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| Title;Atypical Patterns of Ventriculoatrial Conduction over Left-Sided Accessory Pathways in Wolff-Parkinson-White Syndrome. |
| Author;
KONDO N
(Toho Univ. School Of Medicine)
SUGI K
(Toho Univ. School Of Medicine)
IKEDA T
(Toho Univ. School Of Medicine)
ENJOJI Y
(Toho Univ. School Of Medicine)
YAMAGUCHI T
(Toho Univ. School Of Medicine)
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Journal Title;Journal of the Medical Society of Toho University
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Journal Code:G0654A
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ISSN:0040-8670
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VOL.48;NO.4/5;PAGE.310-320(2001)
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| Figure&Table&Reference;FIG.4, TBL.2, REF.19 |
| Pub. Country;Japan |
| Language;English |
| Abstract;The purpose of this study was to characterize atypical patterns of ventriculoatrial (VA) conduction over left-sided accessory pathways (APs). We studied the electrophysiological properties of retrograde conduction of left-sided APs in 58 patients with Wolff-Parkinson-White Syndrome. The VA conduction time was determined by the coronary sinus electrogram nearest to the AP and plotted graphically as a function of the coupling interval for refractory period determination. Of the 58 patients who were found to have a left-sided AP with retrograde conduction, 18 (31%) patients exhibited decremental conduction of more than 10ms during right ventricular extrastimuli. Of these 18 patients, 9 (16%) had a maximal decrement of more than 30ms. The coupling interval that elicited the decremental VA conduction over the AP ranged within the AP effective refractory period. Nine (16%) patients exhibited a shortening of VA conduction time from 10 to 20ms during right ventricular extrastimuli. The coupling interval that elicited the shortening of VA conduction time over the AP was in accordance with the latter part of the T wave. One patient (2%) exhibited both decremental and shortening conduction. The remaining 32 (55%) patients exhibited a constant VA interval. These results suggest that retrograde decremental conduction and shortening of VA conduction time over left-sided APs are not unusual. The behavior of the conduction time in retrograde conduction indicates the complex properties of the Kent bundle, which is different from that of the AV node or working myocardium. (author abst.) |
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