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Reliability of retrograde atrial activation patterns during ventricular pacing for localizing accessory pathways.

Abstract：

:Definitive localization of accessory pathways is based on atrial activation patterns during orthodromic supraventricular tachycardia when retrograde conduction occurs exclusively through the accessory pathway. In some patients, supraventricular tachycardia cannot be induced or is deleterious. To determine whether accessory pathway sites can be identified accurately during ventricular pacing, retrograde atrial activation was assessed during orthodromic supraventricular tachycardia and ventricular pacing at multiple cycle lengths in 41 patients with a single accessory pathway. To obviate retrograde fusion due to concomitant conduction through the normal atrioventricular (AV) conduction system that may obscure the location of the accessory pathway, the difference in conduction time from the site of earliest atrial activation to the His bundle atrial electrogram (delta A-SVT) was measured during orthodromic supraventricular tachycardia and compared with values observed during ventricular pacing (delta A-VP). Characteristic values for the delta A-SVT interval were identified for left lateral (66 +/- 17 ms), left posterior (50 +/- 8 ms), posteroseptal (33 +/- 7 ms), right free wall (22 +/- 15 ms) and anteroseptal (0 +/- 0 ms) accessory pathway sites. During ventricular pacing, the site with the earliest atrial electrogram was used to define the accessory pathway location only if the maximal value of the delta A-VP interval over the range of cycle lengths assessed was comparable with the value of the delta A-SVT interval characteristic of that region. Values of the delta A-SVT interval correlated closely with the maximal values of the delta A-VP interval (r = 0.91). With this approach, 40 (98%) of 41 accessory pathway sites were identified correctly during ventricular pacing.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

J Am Coll Cardiol

journal_title

Journal of the American College of Cardiology

authors

Crossen KJ,Lindsay BD,Cain ME

doi

10.1016/s0735-1097(87)80467-9

subject

Has Abstract

pub_date

1987-06-01 00:00:00

pages

1279-87

issue

6

eissn

0735-1097

issn

1558-3597

pii

S0735-1097(87)80467-9

journal_volume

9

pub_type

杂志文章

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