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The anatomical characteristics of three different endocardial lines in the left atrium: evaluation by computed tomography prior to mitral isthmus block attempt

Cited 21 time in Web of Science Cited 27 time in Scopus
Authors
Cho, Youngjin; Lee, Whal; Park, Eun-Ah; Oh, Il-Young; Choi, Eue-Keun; Seo, Jeong-Wook; Oh, Seil
Issue Date
2012-12
Publisher
OXFORD UNIV PRESS
Citation
EUROPACE Vol.14 No.8, pp. 1104-1111
Keywords
복합학
Abstract
Additional linear ablation lesions are created to improve the outcomes of pulmonary vein (PV) isolation during atrial fibrillation (AF) ablation. We aimed to evaluate the safety and feasibility of additional ablation sites in terms of anatomical characteristics.Multi-detector computed tomography (MDCT) data from 140 consecutive patients (40 with AF, 84 males, 59 11 years old) and additional 10 heart specimens were analysed for their anatomical characteristics at three types of mitral isthmus lines: anteromedial (AM), anterolateral (AL), and posterolateral (PL) lines (from right superior, left superior, and left inferior PV to 10, 12, and 4 oclock position of the mitral annulus, respectively). The data demonstrated that the length was shortest at the PL lines (MDCT, 36.4 8.6 mm; specimens, 31 6 mm) and the maximal myocardial thickness was greatest at the AL lines (MDCT, 3.2 1.0 mm; specimens, 5.0 0.9 mm). Ridge, cord-like structure, or diverticulum was found most frequently at the AM lines (MDCT, 20; specimens, 20). Sinus nodal artery (SNA) was found near the AM (MDCT, 100; specimens, 90) and AL lines (MDCT, 46.3; specimens, 30), while left coronary artery (LCA) and cardiac vein were closest to the PL lines. The trend of these findings was not significantly altered with the presence of AF.The PL lines were shortest among the three mitral isthmus lines, but closest to LCA. Myocardium was thickest at the AL line, and SNAs were frequently found on the anterior lines. Multi-detector computed tomography provided detailed information, and further studies are required to clarify the clinical impact of these findings.
ISSN
1099-5129
Language
English
DOI
https://doi.org/10.1093/europace/eus051
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College of Medicine/School of Medicine (의과대학/대학원)Dept. of Medicine (의학과)Journal Papers (저널논문_의학과)
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