Application of two-dimensional speckle tracking imaging in evaluation of left ventricular diastolic function of patients with primary hypertension

SU Qinghai; LI Xiuming; ZHOU Yumin

doi:10.3969/j.issn.1002-7386.2017.01.007

Abstract：Objective To evaluate the left ventricular diastolic function in patients with essential hypertension by using ultrasound speckle tracking imaging technique .Methods Twenty-two patients with primary hypertension ( observation group) and 16 healthy adults ( control group ) were enrolled in the study . All the subjects were examined by echocardiography ,firstly using tissue Doppler imaging ( TDI) technique to detect mitral ring diastolic velocity to evaluate left ventricular diastolic function ,and to obtain apical four chamber heart ,two chamber heart and long axis view and sternum short axis view,then using STI technique to measure (offline analysis) diastolic longitudinal strain and strain rate,radial strain and strain rate, perimeter strain and strain rate ,and the ratio of diastolic early strain rate /early diastolic strain rate ( RSe/RSA ratio) to evaluate local cardiac muscle diastolic function .Results The longitudinal diastolic early velocity E peak in observation group was significantly lower than that in control group ( P <0.05),moreover, the longitudinal velocity (E peak, A peak) from basal segment to cardiac apical segment showed a gradual decreasing trend , besides, the early diastolic longitudinal strain rate and perimeter strain rate were significantly lower than those in control group ( P <0.05).Conclusion The ultrasound speckle tracking strain imaging technique can quantitatively assess left ventricular regional myocardial diastolic function， for local myocardial diastolic early dysfunction exists in patients with primary hypertension already ，although patient's global left ventricular diastolic function is in the normal range.