Objective: To evaluate the value of strain rate imaging (SRI) detecting synchronism of left ventricular in patients with hypertrophic cardiomyopathy (HCM).
Methods: Twenty-one patients with HCM were divided into 3 groups by thickness of interventricular septum and left ventricular wall :1non hypertrophy (NH), wall thickness ( WT)≤11 mm, 101segments; 2mild hypertrophy(MH), 11 mm16mm, 65 segments; eighteen controls (216 segments) were performed echo examination. tissue velocity imagings of all the patients and controls were accepted in apical four, long axis or two chamber views. The indies included: 1TSSR; 2TESR; 3TSSR-SD; 4TESR-SD; 5ΔTSSR; 6ΔTESR; 7CVTSSR; 8 CVTESR.
Results: Compared with controls, TSSR and TESR of MH and SH of HCM delayed significantly; compared with controls, TESR of NH delayed significantly, but there were no significant difference in TSSR; TSSR and TESR the three groups of HCM delayed in order, NHConclusion: The regional electro-machine time in systole and early diastole of patients with HCM delayed; systolic and diastolic asynchronization of left ventricular exist in HCM and can be evaluated accurately by SRI.