Meanwhile the patient was measured electromechanical time(EMT) and left ventricular pre-ejection period(PEP) by DTI. According to PWT2=EMT-PEP,PWV2=L/PWT2,PWV2 was got.

• 30例患者并行DTI法测量电-机械时间(EMT)、左室射血前期(PEP)、求出脉搏波传递时间(PWT2),PWT2=EMT-PEP,再求出PWV2=L/PWT2。