KMID : 0390620160240040285
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Journal of Cardiovascular Ultrasound 2016 Volume.24 No. 4 p.285 ~ p.293
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Normal 2-Dimensional Strain Values of the Left Ventricle: A Substudy of the Normal Echocardiographic Measurements in Korean Population Study
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Park Jae-Hyeong
Lee Ju-Hee Lee Sang-Yeub Choi Jin-Oh Shin Mi-Seung Kim Mi-Jeong Jung Hae-Ok Park Jeong-Rang Sohn Il-Suk Kim Hyung-Seop Park Seong-Mi Yoo Nam-Jin Choi Jung-Hyun Kim Hyung-Kwan Cho Goo-Yeong Lee Mi-Rae Park Jin-Sun Shim Chi-Young Kim Dae-Hee Shin Dae-Hee Shin Gil-Ja Shin Sung-Hee Kim Kye-Hun Kim Woo-Shik Park Seung-Woo
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Abstract
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Background: It is important to understand the distribution of 2-dimensional strain values in normal population. We performed a multicenter trial to measure normal echocardiographic values in the Korean population.
Methods: This was a substudy of the Normal echOcardiogRaphic Measurements in KoreAn popuLation (NORMAL) study. Echocardiographic specialists measured frequently used echocardiographic indices in healthy people according to a standardized method at 23 different university hospitals. The strain values were analyzed from digitally stored images.
Results: Of a total of 1003 healthy participants in NORMAL study, 2-dimensional strain values were measured in 501 subjects (265 females, mean age 47 ¡¾ 15 years old) with echocardiographic images only by GE echocardiographic machines. Interventricular septal thickness, left ventricular (LV) posterior wall thickness, systolic and diastolic LV dimensions, and LV ejection fraction were 7.5 ¡¾ 1.0 mm, 7.4 ¡¾ 1.0 mm, 29.9 ¡¾ 2.8 mm, 48.9 ¡¾ 3.6 mm, and 62 ¡¾ 4%, respectively. LV longitudinal systolic strain (LS) values of apical 4-chamber (A4C) view, apical 3-chamber (A3C) view, apical 2-chamber (A2C) view, and LV global LS (LVGLS) were -20.1 ¡¾ 2.3, -19.9 ¡¾ 2.7, -21.2 ¡¾ 2.6, and -20.4 ¡¾ 2.2%, respectively. LV longitudinal systolic strain rate (LVLSR) values of the A4C view, A3C view, A2C view, and LV global LSR (LVGLSR) were -1.18 ¡¾ 0.18, -1.20 ¡¾ 0.21, -1.25 ¡¾ 0.21, and -1.21 ¡¾ 0.21-s, respectively. Females had lower LVGLS (-21.2 ¡¾ 2.2% vs. -19.5 ¡¾ 1.9%, p < 0.001) and LVGLSR (-1.25 ¡¾ 0.18-s vs. -1.17 ¡¾ 0.15-s, p < 0.001) values than males.
Conclusion: We measured LV longitudinal strain and strain rate values in the normal Korean population. Since considerable gender differences were observed, normal echocardiographic cutoff values should be differentially applied based on sex.
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KEYWORD
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Echocardiography , Strain , Normal population , Reference value
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