Document Detail


Proximity of right coronary artery to cavotricuspid isthmus as determined by computed tomography.
MedLine Citation:
PMID:  20663073     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
BACKGROUND: Radiofrequency ablation of atrial flutter is a commonly performed procedure. Ablation success depends upon complete transmural atrial tissue injury to achieve bidirectional cavotricuspid isthmus (CTI) block. Transmural ablation increases risk of injury to the adjacent right coronary artery (RCA). Distance between the RCA and the endocardium within the CTI area is not well described. We aimed to perform in vivo measurements of the distance between the CTI area and adjacent RCA.
METHODS: Thirty-three consecutive patients underwent electrocardiogram-gated contrast-enhanced computed tomography. CTI area was divided into nine segments based on three common catheter locations (paraseptal, central, and lateral or 5, 6, and 7 o'clock) and ventricular to atrial ablation line.
RESULTS: Mean age was 64 ± 11 years and 97% of the participants were male. Paraseptal, central, and lateral measurements at the tricuspid annulus ridge showed endocardial to RCA distance 9 ± 3, 6 ± 2, and 5 ± 3 mm, respectively (range 2-17 mm). Corresponding measurements for the ventricular side were 5 ± 3, 4 ± 2, and 4 ± 2 mm and atrial side measurements were 3 ± 2, 3 ± 2, and 3 ± 3 mm. Distance was ≤2 mm in 14% of segments on the ventricular side and 39% of segments on the atrial side. Paired t-test showed significant difference (P < 0.001) between tricuspid annulus ridge measurements and adjacent atrial or ventricular measurements.
CONCLUSIONS: Distance between endocardium and RCA lumen is reduced in areas adjacent to the tricuspid annulus ridge.
Authors:
Basel Al Aloul; Gardar Sigurdsson; Ilknur Can; Jian-Mingi Li; Richard Dykoski; Venkatakrishna N Tholakanahalli
Related Documents :
7484733 - Prospective study of retrograde coronary venography in patients with posteroseptal and ...
24421933 - Coronary sinus to left atrium communication.
1550273 - Anesthesiologists' management of simulated critical incidents.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Pacing and clinical electrophysiology : PACE     Volume:  33     ISSN:  1540-8159     ISO Abbreviation:  Pacing Clin Electrophysiol     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-10-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7803944     Medline TA:  Pacing Clin Electrophysiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1319-23     Citation Subset:  IM    
Copyright Information:
©2010, The Authors. Journal compilation ©2010 Wiley Periodicals, Inc.
Affiliation:
Division of Cardiology, Veterans Affairs Medical Center, University of Minnesota, Minneapolis, MN 55455, USA. alalo001@umn.edu
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Iterative cardiac output measurement for optimizing cardiac resynchronization therapy: a randomized,...
Next Document:  Defibrillation threshold testing in patients with hypertrophic cardiomyopathy.