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AIM:To examine the feasibility and reliability of measuring global and segmental longitudinal strain(LS) compared to visual assessment of wall motion(WM).METHODS:Assessment of segmental(17 left ventricular segments) LS using automatic function imaging(AFI) in 55 patients(60.0 ± 8.7 years,73% male) divided into 2 groups:groupⅠ included 35 patients with WM abnormalities and/or impaired ejection fraction and group Ⅱ included 20 patients with normal WM and ejection fraction.Visual analysis of WM abnormalities was performed using 2-dimensional echocardiography(2DE) and WM score was calculated.Both modalities were analyzed by one expert reader at 2 different sessions.RESULTS:Analysis of 935 left ventricular segments was completed in 94.1% and 96.3% by visual assessment and AFI,respectively.There was a strong positive linear relationship between the WM score and global LS in all patients.Intra-observer agreement for calculation of WM score was excellent for groupⅠ patients(kappa:0.97) and very good for group Ⅱ patients(kappa:0.92).Intra-observer agreement for AFI showed excellent agreement with very small mean difference in both groupⅠ and Ⅱ(-0.0 ± 2.3 and-0.0 ± 1.9,respectively).CONCLUSION:The interpretation of global and segmental LS using AFI is a more feasible and reliable technique for the quantification of myocardial deformation than visual assessment of WM scores.
AIM: To examine the feasibility and reliability of measuring global and segmental longitudinal strain (LS) compared to visual assessment of wall motion (WM). METHODS: Assessment of segmental (17 left ventricular segments) LS using automatic function imaging (AFI) in 55 Patients (60.0 ± 8.7 years, 73% male) divided into 2 groups: group Ⅰ included 35 patients with WM abnormalities and / or impaired ejection fraction and group Ⅱ included 20 patients with normal WM and ejection fraction. Visual analysis of WM abnormalities was performed using 2-dimensional echocardiography (2DE) and WM score was calculated. Two modalities were analyzed by one expert reader at 2 different sessions .RESULTS: Analysis of 935 left ventricular segments was completed in 94.1% and 96.3% by visual assessment and AFI, respectively. There was a strong positive linear relationship between the WM score and global LS in all patients. Intra-observer agreement for calculation of WM score was excellent for group I patients (kappa: 0.97) and very good for group II patients (kappa: 0.92) .Intra-observer agreement for AFI showed excellent agreement with very small mean difference in both group I and II (-0.0 ± 2.3 and -0.0 ± 1.9, respectively) .CONCLUSION: The interpretation of global and segmental LS using AFI is a more feasible and reliable technique for the quantification of myocardial deformation than visual assessment of WM scores.