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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.
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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