Spatial resolution and role of pacemapping during ablation of accessory pathways.
The objectives of this study were: (1) to evaluate quantitatively the spatial resolution of pacemapping: and (2) to assess the predictive value and role of pacemapping for the catheter ablation of overt APs. Sixtythree unipolar leads were used instead of the standard 12-lead ECG to acquire more info...
| Publicado en: | Pacing & Clinical Electrophysiology Vol. 20; no. 3; pp. 683 - 695 |
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| Autores principales: | , , , , , |
| Formato: | Journal Article |
| Publicado: |
Wiley-Blackwell
Mar1997
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=106036867&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 106036867 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01478389 4F8 jtl: Pacing & Clinical Electrophysiology issn: 01478389 maglogo: Y pubinfo: dt: Mar1997 vid: 20 iid: 3 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 106036867 106036867 2009411480 10.1111/j.1540-8159.1997.tb03887.x 106036867 ppf: 683 ppct: 12 formats: fmt: @attributes: type: P tig: atl: Spatial resolution and role of pacemapping during ablation of accessory pathways. aug: au: Molin F Savard P Dubuc M Kus T Tremblay G Nadeau R sug: ab: The objectives of this study were: (1) to evaluate quantitatively the spatial resolution of pacemapping: and (2) to assess the predictive value and role of pacemapping for the catheter ablation of overt APs. Sixtythree unipolar leads were used instead of the standard 12-lead ECG to acquire more information and assess the intrinsic accuracy of pacemapping. Spatial resolution was evaluated in 19 patients for whom data were recorded during bipolar ventricular pacing near the AV ring using the three electrode pairs of a quadripolar ablation catheter with a 5-mm interelectrode spacing. The predictive value was assessed in 27 patients with overt APs who underwent HF ablation: their data were recorded during pacing at the site of successful ablation and at one or two sites where HF energy delivery was ineffective. Data from different beats were compared visually by using body surface potential maps and quantitatively by computing average correlation coefficients (r). Reproducibility was high for paced beats (r = 0.98 ± 0.02). Displacements of 5 mm of the pacing site could be detected with a sensitivity of 90% and a specificity of 87%. Correlation between pacing at successful ablation sites and preexcited sinus rhythm was low (r = 0.79 ± 0.11) and the ablation outcome could be predicted with a negative prediction accuracy of 87% and a positive prediction accuracy of 49%. Despite an excellent spatial resolution, pacemapping is of limited value for the identification of successful AP ablation sites, probably because APs can be interrupted at some distance from their ventricular insertion point. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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