Objective To evaluate the effect of direct percutaneous transluminal coronary angioplasty (PTCA) in early stage in acute myocardial infarction (AMI) by acoustic densitometry (AD) technique Methods 40 patients with AMI were divided into 2 groups: 18 patients with direct PTCA (group A),22 patients with medical treatment (group B) The results of 2 D echocardiography and AD examination were studied on both groups at 7 days after admission Results There was no statistical difference in routine echocardiography between the two groups The results of AD examination showed: cyclic variation of integrated backscatter (CVIB) in group A was (4 2?1 3)dB, it was significantly higher than that in group B (2 5?2 4)dB ( P 0 05) Conclusion AD technology can reflect the changes of tissue characteristics in reperfused myocardia early It is a new technology for evaluating the effect of interventional therapy, predicting the improvement of cardiac function, and assessing the myocardia viability

Objective To determine the feasibility of Tei index in evaluating left ventricular cardiac function in patients with different types of coronary artery disease. Methods Eighty five patients who had received CAG were divided into 4 groups: group Ⅰ as the control group, group Ⅱ with coronary artery diameter stenosis ≥50%

In order to determine whether alteration in right ventricular filling dynamics Occurs in hypertension and compare the filling dynamics of RV and LV pulsed Doppler echocardiographic studes were performed with sample volumes at the tricuspid and mitral anuli in 51 hypertensive patients and 50 normotensive volunteers.Comparing with the normotensives,in hypertensive patients,RV early filling velocity(46±7 vs 41±6,P

Objective To explore the efficacy of circular wound edge protector(CWEP)in preventing surgical site infection (SSI)following open abdominal surgery,analyze the related risk factors for postoperative SSI,and provide scientific basis for preventing SSI following open abdominal surgery.Methods 162 patients who underwent open abdominal surgery in a hospital from March 2014 to December 2015 were randomly divided into intervention group (used CWEP during surgery)and control group (used sterile gauze pad to protect incision).Length of hospital stay,cost of dressing change,and SSI between two groups were compared,risk factors for postoperative SSI were analyzed.Results Incidence of SSI in intervention group was lower than control group (14.81%[12/81]vs 34.57%[28/81],P <0.05);grade-A incision healing rate of intervention group was higher than control group(86.42% vs 66.67%,P <0.05).The cost of dressing change in intervention group was lower than control group([305.5 ± 176.7]yuan vs [431.6 ± 381.4 ]yuan,P = 0.008 ). Multivariate logistic regression analysis indicated that hypoproteinemia(OR,2.88[95%CI ,1.21-6.87]),body mass index ≥24(OR,3.11[95%CI ,1.12-8.66]),and blood loss≥400 mL(OR,3.98[95%CI ,1.36- 11.64])were independent risk factors for postoperative SSI,while CWEP use was the protective factor(OR,0.24[95%CI ,0.09-0.59]).Conclusion CWEP can effectively reduce the incidence of SSI following open abdominal surgery.

Objective To evaluate right ventricular(RV)function by tissue Doppler imaging(TDI)and Tei index in patmnts with coronary artery disease(CAD).Methods One hundred twenty patients who underwent coronary angiography(CAG)were enrolled.Based on clinic evidences,such as CAG,disease history,symptom,ECG,and myocardial enzymes,all patients were divided into three groups:control group,angina group and myocardial infarction(MI)group.TDl was performed on the lateral and septal tricuspid annular.RV Tei index was obtained either from the pulse-wave Doppler(PW-Tel)and from TDI(TDI-Tei).Results There were significant differences in RV PW-Tei,TDI-Tei,Ea,and Ea/Aa among three groups.PW-Tei was 0.363±0.086.0.463±0.078 and 0.569±0.066,and TDI-Tei was 0.400±0.058,0.520±0.078 and 0.628±0.059 for the control group,angina group and MI group,respectively.Ea and Ea/Aa were gradually decreased following the severity of CAD.Sa was no difference between the control group and angina group,while Sa was much lower in mvocardial infarction group than in other groups.RV PW-Tei had a good correlation with the lateral and septal TDI-Tei.The lateral and septal TDI-Tel were significant correlated with motion velocities.Conclusions TDI can be used to comprehensively evaluate RV function in patients with CAD.TDI-Tei can sensitive reflect the damage level of overall RV function in patients with different degree CAD.

Objective To explore the association between transthoracic echocardiography (TFE) derived right ventricular (RV) function parameters with cardiovascular magnetic resonance imaging (CMR)derived RV ejection fraction (RVEF) and 6 minute walk distance (6MWD) in pulmonary hypertension (PH) patients.Methods A total of 40 PH patients (37 pulmonary artery hypertension (PAH) and 3 chronic thromboembolic pulmonary hypertension (CTEPH)) hospitalized in our department between March 2011 and March 2013 were enrolled in this study.PH diagnosis was established by right heart catheterization and TTE,CMR and 6MWT were performed within one week post TTE examination.TTE parameters included:tricuspid annular peak systolic excursion (TAPSE),isovolumic contraction acceleration (IVA),peak systolic velocity (S') at the lateral tricuspid annulus derived from tissue Doppler imaging,RV myocardial performance index (MPI) and RV fractional area change (FAC).RVEF was obtained from CMR.Results S' (r=0.69,P＜0.001),TAPSE (r=0.65,P＜0.001),FAC (r =0.62,P＜0.001),IVA (r =0.43,P =0.006),MPI (r =-0.38,P ＜ 0.05) correlated significantly with RVEF obtained from CMR.The best parameter to detect RVEF≤20％ was S' ＜ 8.79 cm/s(area under the ROC curve was 0.92 (95％ CI:0.72-0.84),sensitivity 0.91,and specificity 0.80).No correlation was found between TTE parameters and 6MWD and between RVEF obtained from CMR and 6MWD.Conclusion S',derived from tissue Doppler imaging correlates best with RVEF obtained from CMR and may facilitate simple and quantitative assessment of RV function.The best parameter to detect RVEF≤20％ is S' ＜ 8.79 cm/s.