Document Detail

Accuracy of combined endocardial and epicardial electroanatomic mapping of a reperfused porcine infarct model: A comparison of electrofield and magnetic systems with histopathologic correlation.
MedLine Citation:
PMID:  21056123     Owner:  NLM     Status:  In-Data-Review    
BACKGROUND: Contact mapping of the ventricle with NAVX has not been validated.
OBJECTIVE: This study sought to compare the accuracy of infarct mapping between NAVX and CARTO using a histopathologic gold standard.
METHODS: A closed-chest porcine infarction model was created by circumflex artery occlusion. After 4 to 12 weeks, 7 subjects underwent high-density endocardial and epicardial mapping using CARTO (Biosense Webster, Diamond Bar, California) and NAVX (St. Jude Medical, St. Paul, Minnesota) mapping systems. After mapping, animals were euthanized and histopathologic examination was used to quantify areas of scar at depths of 1 to 4 mm.
RESULTS: Using a single-point acquisition approach with CARTO and a multipoint acquisition approach with the NAVX, endocardial and epicardial maps created using CARTO consisted of 360 ± 121 points performed in 54 ± 23 minutes/361 ± 90 points in 41 ± 13 minutes compared with 697 ± 132 points in 35 ± 8 minutes/1,303 ± 207 points in 30 ± 11 minutes using NAVX. At a 2-mm depth from the endocardial and epicardial surface, the mean scar area quantified by histopathology was 9.5 ± 8.7 cm(2) and 6.2 ± 4.8 cm(2), respectively. Correlation between histopathology and electroanatomic maps was excellent (r = 0.88, CARTO and 0.92, NAVX). Correlation between scar area determined by CARTO and NAVX was good (r = 0.88, P <.0001).
CONCLUSION: Balloon occlusion-reperfusion of the circumflex artery creates a localized patchy infarction in the inferolateral wall. Multipolar mapping achieves higher density in a shorter period of time and increases the detection of late potentials. A strong correlation between CARTO and NAVX exists, and both systems demonstrate good correlation with histopathologic quantification of scar.
Roderick Tung; Shiro Nakahara; Rafael Ramirez; Dorina Gui; Clara Magyar; Chi Lai; Michael Fishbein; Kalyanam Shivkumar
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Publication Detail:
Type:  Journal Article     Date:  2010-11-04
Journal Detail:
Title:  Heart rhythm : the official journal of the Heart Rhythm Society     Volume:  8     ISSN:  1556-3871     ISO Abbreviation:  Heart Rhythm     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-03-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101200317     Medline TA:  Heart Rhythm     Country:  United States    
Other Details:
Languages:  eng     Pagination:  439-47     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Heart Rhythm Society. Published by Elsevier Inc. All rights reserved.
UCLA Cardiac Arrhythmia Center, David Geffen School of Medicine at UCLA, Los Angeles, California.
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