| A simplified method to determine left atrial volume and transport function using multi-slice computed tomography in patients with atrial fibrillation: comparison with transthoracic echocardiography. | |
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MedLine Citation:
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PMID: 21732027 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Although left atrial volumes (LAVs) and transport function can be accurately measured by multi-slice computed tomography (MSCT) during sinus rhythm, limited data are available for in patients with atrial fibrillation (AF). The aims of our study were to compare LAVs and function assessed by MSCT and transthoracic echocardiography (TTE) during AF, and to validate a simplified method to determine LAVs and functions using MSCT. A total of 150 consecutive AF patients who were scheduled to undergo catheter ablation were enrolled in this study. All subjects underwent MSCT and TTE on the same day. LAVs were measured by MSCT at every 10% of the R-R interval (10-phase analysis). LA transport function was assessed by measuring changes in LAVs. LAVs and functions were also assessed by TTE using a modified Simpson's method and an area-length method. Fifty patients were in sinus rhythm (SR) and 100 were in AF during their examinations. Although TTE underestimated the maximal LAV (LAV(max), by 38.3%) and overestimated the total LA emptying fraction (LAEF(total), by 61.1%) compared with MSCT, there were excellent correlations between TTE and MSCT. LAV(max) and the minimal LAV (LAV(min)) based on MSCT were determined at relatively constant cardiac phases during AF as well as SR (LAV(max); 40%, LAV(min); 100% of R-R interval, fixed-phase analysis). LAVs and LAEF(total) assessed by 10-phase analysis showed good correlations with those assessed by fixed-phase analysis (P < 0.001). LAVs and function assessed by MSCT correlated well with LAVs and functions assessed by TTE, irrespective of the underlying rhythm. Our results indicate that in the context of MSCT, fixed-phase analysis is a simple and reliable method to determine LAVs and function in patients with AF. |
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Authors:
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Seung Yong Shin; Hwan Seok Yong; Jin Oh Na; Cheol Ung Choi; Seong Hwan Kim; Jin Won Kim; Eung Ju Kim; Seung-Woon Rha; Chang Gyu Park; Hong Seog Seo; Dong Joo Oh; Young-Hoon Kim; Hong Euy Lim |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-7-6 |
Journal Detail:
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Title: The international journal of cardiovascular imaging Volume: - ISSN: 1875-8312 ISO Abbreviation: - Publication Date: 2011 Jul |
Date Detail:
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Created Date: 2011-7-6 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100969716 Medline TA: Int J Cardiovasc Imaging Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Cardiovascular Center, Korea University Guro Hospital, 80, Guro-2-dong, Guro-gu, Seoul, 152-703, Republic of Korea. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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