Assessment of left atrial in patients with hypertrophic cardiomyopathy using Speckle tracking imaging

Objective To assess left artial(LA) systolic and diastolic function with strain rate imaging(SRI) in patients with hypertrophic cardiomyopathy(HCM).Methods The strain rate curve was acquired in each LA segment(anterior,posterior,lateral,inferior and septal) by STI in 20 patients(HCM group) and 22 healthy volunteers(control group).The peak strain rate of systolic,early and late diastolic(SRs,SRe,SRa) of left atrial wall were measured.Results The SRs,SRe,SRa of LA walls in the HCM group were lower than those in control group.In control group,the SRs,SRe,SRa of the apical were higher than the basal part of LA wall.In control and HCM group,SRs were negatively correlated with SRe and SRa of LA wall.Conclusion The strain rate of each wall of Left atrial decreased in patients with HCM and lost the law of the movement.The mutual compensatory function of the pump,conduit and reservoir still existed.