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RESEARCH ARTICLE
Year : 2013  |  Volume : 1  |  Issue : 2  |  Page : 51-57

Evaluation of left atrial two-dimensional strain in patients with systolic heart failure using velocity vector imaging


1 Echocardiography Research Center, Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran; Tufts Medical Center, Cardiovascular Imaging, Ultrasound Research Lab, Boston, USA
2 Atherosclerosis Prevention Research Center, Mashhad University of Medical Sciences, Mashhad, IR Iran
3 Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, IR Iran

Correspondence Address:
Farveh Vakilian
Atherosclerosis Prevention Research Center, Mashhad University of Medical Sciences, Mashhad
IR Iran
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Source of Support: None, Conflict of Interest: None


DOI: 10.5812/acvi.14486

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Background: Two-dimensional (2D) Strain is a new reproducible technique for assessing regional myocardial function; however, its application for evaluation of left atrium (LA) function is less studied. Objectives: We sought to assess LA function in heart failure patients using velocity vector imaging (VVI). Patients and Methods: Thirty five patients (mean age: 43.34 ± 18.1 years, 59.3% male) with systolic dysfunction [left ventricle ejection fraction (LVEF) < 35%] enrolled. Standard Doppler echocardiography and 2D strain were performed on all subjects. Strain measurements were obtained from apical views. Results: A significant differences in LA volume index (LAVI) and strain were found in patients with systolic heart failure (SHF) versus normal subjects (23.8 ± 4.1 versus 57.8 ± 19.7 ml/m2, P < 0.001 and 39.6 ± 10.6 versus 8.2 ± 5.3%, P < 0.001). Multivariate analysis of separate walls revealed significant inverse relationship between LA size and volume with total and regional (2-ch view) 2D strains of LA. Significant inverse relationship were also detected between pulmonary artery systolic pressure and both total LA strain (22 ± 8 versus 42 ± 10 mmHg, r = -0.4, P < 0.001) and LA strain in 2-chamber (r = -0.5, P < 0.001). A cutoff value of total average LA strain (≥ 23.28%) can differentiate normal and abnormal LA function with a sensitivity of 93% and specificity of 100% and a cutoff value of total LA strain (in average) of 17.2% can differentiate mild and moderate and severe diastolic dysfunction with a sensitivity of 100% and a specificity of 97%. Conclusions: LA strain seems to be a better determinant for diagnosis of abnormal LA function and the degree of diastolic dysfunction in SHF.


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