Impaired left ventricular synchronicity in hypertensive patients with ventricular hypertrophy.
OBJECTIVE
The influence of left ventricular hypertrophy (LVH) on left ventricular synchronicity, and the prevalence of left ventricular dyssynchrony in hypertensive patients with LVH are unknown. The purpose of this study was to determine the influence of LVH on left ventricular synchronicity in hypertensive subjects.


METHODS
Tissue Doppler imaging (TDI) was performed in 115 hypertensive and 30 control individuals. Hypertensive patients were divided into a LVH group and a non-LVH group according to the left ventricular mass index (LVMI). Diastolic and systolic asynchrony was determined by measuring the maximal differences in time to peak myocardial systolic contraction (Ts-max) and early diastolic relaxation (Te-max) between any two of the left ventricular segments and the standard deviation of time to peak myocardial systolic contraction and early diastolic relaxation of all 12 segments.


RESULTS
Ts-max was greater in both the non-LVH and LVH groups than in controls, (96.68 +/- 26.21 versus 79.30 +/- 25.19 versus 53.20 +/- 15.24 ms, both P < 0.001) and in the LVH group than in the non-LVH group (96.68 +/- 26.21 versus 79.30 +/- 25.19 ms, P < 0.01). Te-max was prolonged in both patient groups, being most advance in the LVH group (67.39 +/- 11.01 versus 57.18 +/- 11.42 versus 46.72 +/- 13.24 ms, both P < 0.001 versus control group and P < 0.001 versus non-LVH group). LVH patients had shown a greater prevalence of both systolic and diastolic asynchrony than non-LVH patients. A Ts-max value greater than 88 ms had 68% sensitivity and 71% specificity for detecting hypertensive patients with LVH.


CONCLUSIONS
Left ventricular systolic synchronicity was impaired in hypertensive patients with LVH. TDI was shown to be useful for the detection of myocardial abnormalities in such patients.
Tan
Hong-wei
HW
Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education and Chinese Ministry of Health, Jinan, China.
Zheng
Guo-ling
GL
Li
Li
L
Wang
Zhi-hao
ZH
Gong
Hui-ping
HP
Zhang
Yun
Y
Zhong
Ming
M
Zhang
Wei
W
D000293:Adolescent; D000328:Adult; D000368:Aged; D003971:Diastole; D018618:Echocardiography, Doppler, Color; D005260:Female; D006352:Heart Ventricles / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006801:Humans; D006973:Hypertension / Q000150:complications* / Q000000981:diagnostic imaging; D017379:Hypertrophy, Left Ventricular / Q000000981:diagnostic imaging* / Q000209:etiology / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D013599:Systole