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Feasibility of Two‐Dimensional Global Longitudinal Strain and Strain Rate Imaging for the Assessment of Left Atrial Function: A Study in Subjects with a Low Probability of Cardiovascular Disease and Normal Exercise Capacity
Author(s) -
Kim Dong Gyu,
Lee Kyung Jin,
Lee Sahng,
Jeong SoYeon,
Lee Young Sook,
Choi Yu Jeong,
Yoon Hyeon Soo,
Kim Jeong Hee,
Jeong Kyung Tae,
Park Soon Chang,
Park Mira
Publication year - 2009
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/j.1540-8175.2009.00955.x
Subject(s) - cardiology , medicine , speckle tracking echocardiography , diastole , ejection fraction , systole , ventricle , longitudinal study , blood pressure , heart failure , pathology
Background: Two‐dimensional (2D) speckle imaging has shown that it could evaluate not only regional but also global strain (ɛ) and strain rate (SR) of the left and right ventricles. There are no data for global ɛ/SR imaging for left atrial (LA) function evaluation. Methods: A total of 54 subjects (37 men; mean age, 44 ± 10 years) with normal treadmill exercise stress echocardiography and no coronary risk factors were enrolled. Global longitudinal LA ɛ/SR data obtained by 2D speckle imaging with automated software (EchoPAC, GE Medical) were compared with LA volumetric parameters. Results: LA ɛ/SR imaging was acceptable in all patients. Bland‐Altman analysis for these parameters showed no evidence of any systematic difference regarding inter‐ and intraobserver variabilities. Global longitudinal LA strain during systole and peak systolic global longitudinal LA SR were correlated with LA total emptying fraction (EF) (r = 0.399, P = 0.004; r = 0.366, P = 0.008). Global longitudinal LA strain during early diastole and peak early diastolic global longitudinal LA SR were correlated significantly with LA passive EF (r = 0.476, P < 0.001; r = 0.507, P < 0.001). Global longitudinal LA strain during late diastole and peak late diastolic global longitudinal LA SR were not correlated with LA active EF (r = 0.198, P = 0.163; r = 0.265, P = 0.060). Conclusions: Global longitudinal LA ɛ/SR parameters determined by 2D speckle tracking echocardiography are feasible and reproducible indices for the evaluation of LA function. (ECHOCARDIOGRAPHY, Volume 26, November 2009)