Abstract: Objective: To explore the relations between left ventricular hypertrophy(LVH),blood pressure variability(BPV) and QTcd in elderly patients with essential hypertension(EH).Methods: Sixty-nine elderly patients with EH essential hypertension were performed echocardiography,24 h ambulatory blood pressure monitoring and 12-lead synchronous resting electrocardigram.The left ventricular mas indexes(LVMI),QTcd and the BPV were measured with echocardiography.Results: The average LVMI of myocardium hypertrophy group was(158.68±23.57) g/m²,which was significantly increased compared with that of the control group(P<0.001).The 24 h SBPV,dSBPV,nSBPV and QTcd of the EH patients with LVH were significantly higher than those of EH patients without LVH(P<0.01-P<0.001).Conclusions: The study suggests that LVH is correlated with BPV.LVH is the risk factor for cardiac dysrhythmia and sudden death.Control of BPV should be considered in treatment of elderly patients with EH.