Application Value Of Ultrasound In Contraction Of Lower Limb Veins And Left Ventricular Myocardium In Heroin Abusers

PartⅠ:The value of color doppler ultrasonography in venous hemodynamics of lower limbs in intravenous injection of heroin abusersObjective To evaluate the value of color doppler ultrasonography in the diagnosis of venous hemodynamics in the lower extremity in intravenous injection of heroin.Methods Fifty-nine patients were randomly selected from drug addicts who had a history of heroin intravenous injection for 2 years or more in the Compulsory Detoxification Center as case group.In the same period,fifty-two volunteers of non-drug addicts were selected in the physical examination in our Hospital as control group.After removing the confounding factors of other diseases,the femoral vein diameter,maximal velocity(Vmax)and stasis index(SI)of the two groups were compared.The thrombosis status and venous valve function were observed.Results The mean femoral vein diameter [(5.65 ± 1.61)mm] was less,Vmax [(30.06 ± 11.75)cm / s] was slower,SI(1.34 ± 0.97)was higher,the rate of thrombosis(15.25%)was higher,the rate of venous insufficiency in the lower extremities(13.56%)was higher than those in control group [(6.97 ± 0.93)mm,(39.33 ± 13.58)cm / s,(0.98 ± 0.54),3.85%,1.92%].There were significant differences between case group and control group(P<0.05).Conclusions Color Doppler Ultrasonography can be sensitive to evaluate the state of blood stasis,which is valuable for predicting the risk of thrombosis.Part Ⅱ : Diagnostic Value of Ultrasound Speckle-Tracing Imaging in Left Ventricular Local Myocardial systolic Function in Heroin AbusersObjective To observe the movement of segmental wall of left ventricular myocardium in heroin abusers by speckle tracking imaging in echocardiography.Methods The observation group was 48 cases of heroin abusers with a history of drug abuse of 5 years or more,while the control group was 38 healthy volunteers without history of drug abuse.Left ventricular ejection fraction(LVEF)and left ventricular fractional shortening(LVFS)were measured in two-dimensional gray scale,M-type and spectrum Doppler mode respectively.After removing the confounding factors of other diseases,speckle tracking was performed on each segment of anterior wall and inferior wall of left ventricle in apical two-chamber heart plane.The systolic peak velocity(Vs),peak displacement(Ds),longitudinal peak strain(LS)and longitudinal peak strain rate(LSR)of each segment were measured.Results There was no significant difference in cardiac chamber size,LVEF and LVFS between the observation group and the control group(P > 0.05).The peak systolic peak velocity(Vs),peak displacement(Ds),longitudinal strain(LS)and longitudinal strain rate(LSR)of the apical segment of the left ventricular wall,the myocardium and the basal segment of the anterior wall,the basal segment of the anterior interwall,and the longitudinal strain rate(LSR)were all lower than those in the control group in the three sections of the long axis of the left ventricle;and the difference was statistically significant in P <0.05.The basal segment of the lower wall,the basal segment of the lateral wall,the basal segment of the posterior wall,the basal segment of the interventricular septum,Vs,Ds,LS and LSR in the observation group were lower than those of the control group,but P > 0.05,the difference was not statistically significant.Conclusions Heroin may lead to abnormal left ventricular myocardial systolic function.Speckle-Tracing Imaging may be more sensitive to assess the segmental wall motion of heroin abusers,and may be of value in detecting the early local myocardial systolic function changes.