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Objective To evaluate the feasibility of beside color Doppler ultrasound-guided popliteal vein catheter in treatment of lower extremity deep venous thrombosis (LEDVT).Methods Data of 50 patients with unilateral LEDVT were reviewed,including 25 cases underwent beside color Doppler ultrasound-guided catheter thrombolytic therapy (catheter thrombolytic group) and 25 cases underwent systemic thrombolysis and anticoagulant therapy (anticoagulant thrombolysis group).The cure rate,hospitalization time and the bilateral diameter differences were compared between the 2 groups.Results Thrombolytic effective rate was 100％ in both the 2 groups.Thirty patients were clinical cured,including 22 cases in catheter thrombolytic group and 8 cases in anticoagulant thrombolysis group.The cure rates were significantly different between the 2 groups (88.00％ [22/25] vs 32.00％ [8/25],x2 =16.333,P＜ 0.001).The hospitalization time of catheter thrombolytic group ([12.32 ± 1.49] days) was shorter than that of anticoagulant thrombolysis group ([16.44±2.95]days;t=-6.426,P＜0.001).The diameter differences between LEDVT side and contralateral side of the upper and lower 15 cm form knees in catheter thrombolytic group showed no statistical difference compared with anticoagulant thrombolysis group before the treatment (both P＞0.05),while of catheter thrombolytic group were smaller than those of anticoagulant thrombolysis group after the treatment (both P＜0.05).And the bilateral diameter differences before the treatment were larger than those after the treatment in both groups (all P ＜ 0.05).Conclusion Both of beside color Doppler ultrasound-guided catheter thrombolytic therapy and systemic thrombolysis and anticoagulant therapy can be used to treat LEDVT,while the efficacy of ultrasound-guided catheter thrombolytic therapy is better.
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Two-dimensional speckle tracking imaging(2D-STI)can accurately evaluate myocardial strain with non-angle dependent and good reproducibility. In this study, 16 patients with hypertrophic cardiomyopathy (HCM), 18 athletes and 20 normal subjects underwent 2D-STI examination. The global longitudinal strain (GLS) and regional peak systolic strain (PSS) were assessed by 2D-STI in the apical four-chamber-view. Compared to athletes and normal subjects, GLS in patients with HCM was significantly reduced [GLS: -(8. 0±3.6)% , P ＜ 0. 01]. There was no significant difference in GLS between athletes and the controls, but GLS in basal or middle segments of interventricular septum and middle segments of lateral wall; PSS in basal, middle or apical segments of interventricular septum and basal or middle segments of lateral wall of the normal controls were significantly higher than those of the athletes. A cut-off value of less than -10% in GLS for diagnosis of pathologic hypertrophy resulted in a sensitivity of 84. 0% and a specificity of 94. 0%. The results suggest that 2D-STI can quantify global and regional myocardial function and may be used for the differentiation between physiological and pathologic LVH.
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Objective To evaluate the effect of torsion on remodeling and function of left ventricle by two-dimensional speckle tracking imaging(2D-STI) in patients with dilated cardiomyopathy(DCM).MethodsThirty-nine patients with DCM and thirty-five controls accepted conventional echocardiography,pulsed-wave Doppler tissue imaging examination.Basal and apical short-axis view of left ventricle were accorded for Q-lab analysis.Indices included:left ventricular diameter in end diastole (LVEDd),left ventricular ejection fraction (LVEF),left ventricular sphericity index (LVSI),left ventricular mass index (LVMI),e-wave of mitral valvular flow (E),velocity of mitral annulus in systole (S),velocity of mitral annulus in early distole ( E'), E/ E',rotation of left ventricle at basal and apical level(Rbasal,Rapical),twist (T),torsion (T').Results Compared with controls,LVEDd,LVMI of patients with DCM increased significantly,LVEF and LVSI decreased significantly,S and E' decreased significantly,E/ E' increased significantly.Patients with DCM were divided into two groups:group DCM-1 (clockwise rotation at apical level) and group DCM-2 (countclockwise rotation at apical level).Compared with controls,Rasal,Rapical,T,T' of two DCM groups decreased significantly.Compared with group DCM-1,Rbasal,Rapical,T,T' of group DCM-2 decreased significantly,LVEDd,LVMI increased significantly,LVEF and LVSI decreased significantly,E' decreased significantly,E/ E' increased significantly.Conclusions The torsion of left ventricle decrease in patients with DCM,DCM patients with decreased or reversed torsion of left ventricular apex have more severe LV remodeling or damage of LV function.
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Objective To evaluate the changes of the left atrial function in patients with old myocardial infarction(OMI) by strain rate imaging(SRI). Methods The velocity of the left atrial lateral wall and atrial septum was measured by SRI in 30 patients with OMI(OMI group) and 25 normal subjects (control group). Left atrium passive eject volume index(LAPEVl) and left atium active eject volume index (LAAEVI) were measured using Simpson method. Results ①Compared with the control group, the velocity of the left atrium was reduced obviously in ventricular systole and early ventricular diastole in OMI group(P<0.05) ,but was increased in late ventricular diastole(P<0.05). ②Compared with the controls, LAAEVI was increased significantly in OMI group, but LAPEVI was decreased signicantly(P <0.001). Conclusions SRI could be used to evaluate the left atrial function accurately in patiens with OMI.
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f strain rate in left atrial wall, which is prior to the remodeling geometry of left ventrieular, could be detcted by STI more sensitively than by SRI.