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Left ventricular dysfunction measured by tissue doppler imaging and strain rate imaging in hypertensive adolescents

Title
Left ventricular dysfunction measured by tissue doppler imaging and strain rate imaging in hypertensive adolescents
Authors
Ahn H.M.Jung S.O.Kwon J.H.Hong Y.M.
Ewha Authors
홍영미
SCOPUS Author ID
홍영미scopus
Issue Date
2010
Journal Title
Korean Journal of Pediatrics
ISSN
1783-1061JCR Link
Citation
vol. 53, no. 1, pp. 72 - 79
Indexed
SCOPUS scopus
Abstract
Purpose: Left ventricular (LV) hypertrophy and impaired diastolic function may occur early in systemic hypertension. Diastolic dysfunction is associated with increased cardiovascular risk. Tissue Doppler imaging (TDI)-derived tissue velocity and strain rate are new parameters for assessing diastolic dysfunction. The aim of this study is to determine whether TDI and strain rate imaging (SRI) would improve the ability to recognize early impaired diastolic and systolic functions compared with conventional echocardiography in hypertensive adolescents. Methods: We included 38 hypertensive patients with systolic blood pressure above 140 mmHg or diastolic blood pressure above 90 mmHg. Ejection fraction and myocardial performance index (MPI) were estimated by conventional echocardiography. Peak systolic myocardial velocity, early diastolic myocardial velocity (Em), and peak late diastolic myocardial velocity (Am) were obtained by using TDI and SRI. Results: In the hypertensive group, interventricular septal thickness was significantly increased on M-mode echocardiography. Em/Am was significantly decreased at the mitral valve annulus. Among hypertensive subjects, the E strain rate at basal, mid, and apex was significantly decreased. Systolic strain was significantly decreased at the septum in the hypertensive group. Conclusion: Strain rate might be a useful new parameter for the quantification of both regional and global LV functions and could be used in long-term follow up in hypertensive patients. Early identification by SRI of subjects at risk for hypertensive and ventricular dysfunction may help to stratify risk and guide therapy. Further studies, including serial assessment of LV structure and function in a larger number of adolescents with hypertension, is necessary.
DOI
10.3345/kjp.2010.53.1.72
Appears in Collections:
의과대학 > 의학과 > Journal papers
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