| Influence of high-pass filtering on noncontact mapping and ablation of atrial tachycardias. | |
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MedLine Citation:
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PMID: 14720153 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The aim of the study was to define the impact of different high-pass filter settings (HPF) on the accuracy of mapping of ectopic atrial tachycardias (EAT) using a noncontact mapping (NCM) system. In 20 patients with 22 EAT a noncontact probe was deployed in the right (n = 19) or in the left atrium (n = 3). The device enables interpolation and analysis of unipolar electrograms. It provides information on focus localization and signal morphology. These parameters were compared in different HPF of 0.5 Hz, 2 Hz, 8 Hz, and 16 Hz. The NCM signal morphology was preserved at all HPF. An initial negative deflection recorded by NCM system showed a positive predictive value of 93% regarding the ablation success. The deviation (spatial disparity) between visualized focus origin and successful ablation site was 6.9 +/- 5.4 mm. Between two consecutive filter settings, the focus shift was more pronounced between 0.5 and 2 Hz (5.4 +/- 4.5 mm) compared to a setting between 8 and 16 Hz (2.9 +/- 2.9 mm; P < 0.05). Successful ablation was achieved in 15/18 right atrial tachycardias (83%) and in 2/3 left atrial arrhythmias. Different HPF influence NCM spatial analysis of EAT. However, a small variability in foci localization does not impact final ablation results. |
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Authors:
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Michael A E Schneider; Gjin Ndrepepa; Stefan Weber; Isabel Deisenhofer; Albert Schömig; Claus Schmitt |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Pacing and clinical electrophysiology : PACE Volume: 27 ISSN: 0147-8389 ISO Abbreviation: Pacing Clin Electrophysiol Publication Date: 2004 Jan |
Date Detail:
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Created Date: 2004-01-14 Completed Date: 2004-06-01 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 7803944 Medline TA: Pacing Clin Electrophysiol Country: United States |
Other Details:
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Languages: eng Pagination: 38-46 Citation Subset: IM |
Affiliation:
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Deutsches Herzzentrum and I. Med. Klinik, Technische Universität München, Munich, Germany. MAE.Schneider@t-online.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Body Surface Potential Mapping
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methods* Catheter Ablation* / methods Female Follow-Up Studies Humans Male Middle Aged Tachycardia, Ectopic Atrial / physiopathology*, surgery* |
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