Association of left ventricular geometric model with atrial electromechanical time in patients with essential hypertension

Objective To investigate the association of left ventricular geometric model and atrial electromechanical time in patients with essential hypertension by tissue Doppler imaging(TDI).Methods Ninety patients with essential hypertension were enrolled.Among them,23 patients had history of paroxysmal atrial fibrillation(AF group),67 patients had no history of atrial fibrillation(NAF group).According to Ganau categories,these patients were divided into four groups: normal left ventricle geometric model(NG group,30 cases),concentric remodeling(CR group,20 cases),concentric hypertrophy(CH group,16 cases) and eccentric hypertrophy(EH group,24 cases),and 20 healthy subjects as control group were included.Left and right atrial electromechanical time(LP-A,RP-A) was acquired by TDI.Results Compared with NAF group,LP-A and RP-A of AF group were longer(P(0.01)).There was also significant difference between NAF group and control group(P(0.05)).Compared with NG groups,LP-A and RP-A of other three groups were all longer.Compared with CR groups,LP-A and RP-A of CH group and EH group were both longer(P(0.05)).There was no significant difference between CH group and EH group(P(0.05)).Conclusions Atrial electromechanical time in patients with essential hypertension is increased following the developing of left ventricular geometric model.It is obviously longer in patients with left ventricle hypertrophy and may be a predictor for the onset of atrial fibrillation.