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Titolo:
JUNCTIONAL TACHYCARDIA - A USEFUL MARKER DURING RADIOFREQUENCY ABLATION FOR ATRIOVENTRICULAR NODE REENTRANT TACHYCARDIA
Autore:
THAKUR RK; KLEIN GJ; YEE R; STITES HW;
Indirizzi:
UNIV WESTERN ONTARIO HOSP,339 WINDERMERE RD,BOX 5339 LONDON N6A 5A5 ON CANADA UNIV WESTERN ONTARIO,DEPT MED LONDON ON CANADA
Titolo Testata:
Journal of the American College of Cardiology
fascicolo: 6, volume: 22, anno: 1993,
pagine: 1706 - 1710
SICI:
0735-1097(1993)22:6<1706:JT-AUM>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARKINSON-WHITE SYNDROME; CATHETER ABLATION; ENERGY; CONDUCTION; PATHWAYS; CURE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
R.K. Thakur et al., "JUNCTIONAL TACHYCARDIA - A USEFUL MARKER DURING RADIOFREQUENCY ABLATION FOR ATRIOVENTRICULAR NODE REENTRANT TACHYCARDIA", Journal of the American College of Cardiology, 22(6), 1993, pp. 1706-1710

Abstract

Objectives. The aim of this study was to evaluate junctional tachycardia as a useful marker during radiofrequency ablation for atrioventricular (AV) node reentrant tachycardia. Background. Junctional tachycardia appears to be a response of the atrioventricular node to injury andis seen during both radiofrequency AV node ablation and slow and fastpathway ablation for AV node reentrant tachycardia. We hypothesized that junctional tachycardia heralding AV node block and that associatedwith slow or fast pathway ablation may have different characteristicsthat could be useful in preventing inadvertent AV block. Methods. Characteristics of junctional tachycardia were examined after 59 radiofrequency ablation sessions in 53 consecutive patients with a mean age (+/- SD) of 41.6 +/- 16.5 years. Type 1 junctional tachycardia was followed by transient second or third degree AV block (n = 5) or permanent third degree AV block (n = 1). Type 2 junctional tachycardia was followed by normal AV conduction (n = 53). Results. Fifty one patients had typical AV node reentrant tachycardia, and two patients had atypical tachycardia. Fast pathway ablation was attempted during 6 sessions and slow pathway ablation during 53 sessions. Patients underwent 15.3 +/- 10 radiofrequency applications, with a mean duration of 24 +/- 9.7 s. Junctional tachycardia was observed an average of 2.8 +/- 1.8 times per ablation session. Type 1 junctional tachycardia had a significantly faster rate than that of type 2 (cycle length 363 +/- 44 vs. 558 +/- 116, p < 0.001). In addition, type 1 junctional tachycardia was associated with predominantly ventriculoatrial block whereas type 2 was associated with predominantly 1:1 ventriculoatrial conduction (2 of 6 vs. 47 of 53 episodes, p < 0.05). Conclusions. We conclude that junctional tachycardia leading to AV block can be recognized by a faster junctional rate and ventriculoatrial block. This is a useful marker of impending AV block during slow and fast pathway ablation.

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Documento generato il 06/04/20 alle ore 08:27:41