| Relative timing of isolated potentials during postinfarction ventricular tachycardia and sinus rhythm. | |
| | |
MedLine Citation:
|
PMID: 14739752 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
BACKGROUND: In postinfarction patients, isolated potentials separated by an isoelectric segment from the ventricular electrogram indicate areas of block. Isolated potentials can be recorded during both sinus rhythm and ventricular tachycardia (VT). In an attempt to differentiate bystander pathways from critical sites within a reentry circuit, we compared the relative timing of isolated potentials during VT and sinus rhythm. METHODS: In 19 patients (mean age 68 +/- 6 years) with postinfarction VT who were referred for VT ablation, mapping was performed in the presence and absence of VT. Forty-three sites at which there was concealed entrainment during 35 VT's (mean cycle length 469 +/- 74 ms) displayed an isolated potential separated from the main portion of the ventricular electrogram by an isoelectric segment of >/=30 msec in the presence and absence of VT. The interval between the ventricular electrogram and the isolated potential was measured during VT and baseline rhythm, and the absolute difference (DeltaIPI) was calculated. The DeltaIPI was significantly greater at effective ablation sites (119 +/- 69 ms) than at ineffective ablation sites (30 +/- 28 ms, p < 0.001). The positive predictive value of a DeltaIPI > 85 ms for an effective ablation site was 100%. CONCLUSION: At sites of concealed entrainment, an absolute difference >85 ms between the isolated potential intervals during sinus rhythm and VT is highly specific for a critical area of the VT reentry circuit in post-infarction patients. |
| | |
Authors:
|
Frank Bogun; Joseph E Marine; Stefan H Hohnloser; Hakan Oral; Frank Pelosi; Fred Morady |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Journal of interventional cardiac electrophysiology : an international journal of arrhythmias and pacing Volume: 10 ISSN: 1383-875X ISO Abbreviation: J Interv Card Electrophysiol Publication Date: 2004 Feb |
Date Detail:
|
Created Date: 2004-01-23 Completed Date: 2004-06-24 Revised Date: 2004-11-17 |
Medline Journal Info:
|
Nlm Unique ID: 9708966 Medline TA: J Interv Card Electrophysiol Country: United States |
Other Details:
|
Languages: eng Pagination: 65-72 Citation Subset: IM |
Affiliation:
|
Henry Ford Hospital, Division of Cardiology, Detroit, Michigan 48202-9888, USA. bogun@eudoramail.com |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Action Potentials Aged Cardiac Pacing, Artificial Catheter Ablation Electrocardiography* Female Heart Conduction System / physiopathology*, surgery Humans Male Myocardial Infarction / complications* Sensitivity and Specificity Tachycardia, Ventricular / etiology, physiopathology*, surgery Ventricular Function |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Effect of left atrial-coronary sinus musculature connections on the coronary sinus activation patter...
Next Document: Persistent tachycardia with a 2:1 exit block within an isolated pulmonary vein.