Investigation of relationship between carotid artery intima-media thickness, blood pressure and QT dispersion of young people / 中华超声影像学杂志

ABSTRACT

Objective To investigate the relationship between carotid artery intima-media thickness(IMT) and blood pressure(BP) as well as QT dispersion in 18 - 35 young people. Methods Body mass index (BMI) and BP of 107 people in 18 - 35 years of age were measured, the carotid artery was also detected by 2-dimensional and color Doppler ultrasound. According to BMI,a]I candidates were divided into group A(norrnal BMI) and group B(obesity), then the relationship between IMT and BP, QT dispersion were analyzed. Results Compared with group A,BP,IMT,QT dispersion in group B were increased, there was significant diference between the two group (P <0.05). Relationship was positive correlative between IMT and systolic BP(LIMT r=0.224, P=0.021;RIMTr=0.193,P=0.047) ,but negative correlative between IMT and diastolic BP(LIMT r=0.123, P=0.210; RIMT r=0.138, P=0.159). The risk estimate of abnormal IMT was higher when QT dispersion >50 ms than that ≤50 ms(OR=6.223, P<0.05). Conclusions The systolic BP is positive correlative with IMT of carotid artery at age 18-35,increasing QT dispersion is a high risk factor of abnormal IMT. IMT should be detected when QT dispersion >50 ms and systolic BP >120 mm Hg.