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Two‐Dimensional Tissue Tracking: A Novel Echocardiographic Technique to Measure Left Atrial Volume: Comparison with Biplane Area Length Method and Real Time Three‐Dimensional Echocardiography
Author(s) -
Li ShiYan,
Zhang Li,
Zhao BoWen,
Yu Chan,
Xu LiLong,
Li Peng,
Xu Ke,
Pan Mei,
Wang Bei
Publication year - 2014
Publication title -
echocardiography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 62
eISSN - 1540-8175
pISSN - 0742-2822
DOI - 10.1111/echo.12460
Subject(s) - biplane , intraclass correlation , medicine , ejection fraction , cardiology , nuclear medicine , limits of agreement , reproducibility , radiology , mathematics , statistics , heart failure , materials science , composite material
Enlargement of the left atrium is an independent predictor of adverse cardiovascular outcomes, and an accurate, convenient imaging modality is necessary for clinical practice. The objectives of this study were to evaluate the feasibility of a novel imaging technique, two‐dimensional tissue tracking (2 DTT ), for assessment of left atrial (LA) volume and function and to compare its correlation and agreement with biplane area length ( AL ) method and real time three‐dimensional echocardiography ( RT 3 DE ). A total of 105 patients prospectively underwent 2 DTT , AL and RT 3 DE . The LA volume index (LAVI) and emptying fraction were measured. In addition, intra‐ and inter‐observer agreement were calculated by using the intraclass correlation coefficient. There were no significant differences in LAVI and emptying fraction measured by 2 DTT in comparison with those made by AL or RT 3 DE , furthermore Bland–Altman analysis showed that 2 DTT had significantly better agreement for LAVI and emptying fraction with AL and RT 3 DE . 2 DTT also exhibited smaller intra‐ and inter‐observer variability as compared with AL or RT 3 DE . Furthermore, the time to measure LA volume and acquire time–volume curve was significantly less by 2 DTT than that by RT 3 DE (U = 49.00, P < 0.001). These observations suggest that the 2 DTT could provide valuable information which is consistent with the standard AL and RT 3 DE measurements for LAVI and function with potentially lower intra‐ and inter‐observer variability.