Abstract: Abstract Objective: To evaluate the clinical value of left atrial function in primary hypertensive patients by Strian Rate Imaging(SRI). Methods:89 patients with primary hypertensions were divided into groups of normal geometry (LVN,n= 40) and remodeling geometry (LVR, n= 49).41 healthy participants were also included.At four-chamber view,the strain rate curves was gained in the middle segments of each left atrial lateral wall by SRI.Strain rate parameters SRs were measured during left ventrial systolic phase,SRe and SRa were measured during left ventrial diastolic early phase and later phase;Peak velocity during left ventrial diastolic early phase and later phase (Ea and Aa) at the left ventricle lateral wall of annulus mitral valve were measured on Tissure Doppler imaging(TDI),then Ea/Aa were calculate. E Peak and A Peak velocity (E and A) of bicuspid were measured on pulsed wave Doppler(PW),then E/A were calculate.Left atrial AP diamind(LAD) were measured on 2D. Results: Compared with the control group, the SRs and SRe were reduced in two hypertensive Group,meanwhile the SRa was higher in LVN group（p＜0.01）;Ea/Aa were reduced in two hypertensive group,E/A were reduced in LVR group（p＜0.01）, LAD was higher in two hypertensive group and LAD in LVR was higher than that in LVN（p＜0.01）.Conclusions: The SRa、SRe and SRs can assess left atrial systolic and diastolic function.

Key words: strain rate imaging, hypertension, left atrial function