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LV Torsion and Ventricular-arterial Coupling in Hypertensive Patients
계명대학교병원
김형섭, 배한준, 이호명, 신홍원, 조현옥, 박형섭, 윤혁준, 조윤경, 남창욱, 허승호, 김윤년, 김권배
Background: Vascular stiffness associated with hypertension would increase arterial elastance (Ea), whereas LV end-systolic stiffness (Ees) could be influenced by hypertensive LV hypertrophy.
Objectives: In hypertensive patients, we investigated whether ventricular-arterial coupling (Ea/Ees) may affect LV torsion which may be an important systolic function.
Methods: Hypertensive patients without hypertrophy (n=55) and patients with hypertrophy (n=47) underwent 2D and speckle-tracking echocardiography.
Results: Hypertrophic patients had a more impaired mitral annular Doppler velocities and much lower LV torsion (18.9 vs 27.2 deg., p<0.001). While Ea was similar between two groups, Ees was significantly decreased in patient with hypertrophy, resulting into increased Ea/Ees ratio (1.03 vs. 0.75, p<0.001). Although LV torsion had significantly correlations with ejection fraction, midwall fractional shortening, LV mass index, and Ees, the correlation between LV torsion and Ea/Ees (beta=-15.2, p<0.001) was more robust in a multivariate regression analysis.
Conclusion: Abnormal LV torsion is evident in patient with hypertensive heart disease and this may be contributed by impaired Ea/Ees. The relationship of LV torsion to Ea/Ees may provide a better fundamental understanding of the hypertensive hypertrophy.
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