ABSTRACT
Objective To investigate the effect of paclitaxel drug-coated balloon (DCB) dilatation in treating coronary in-stent restenosis (ISR) occurring after drug-eluting stent (DES) implantation,and to observe the long-term changes of the target vascular lumen area in order to clarify the curative effect of paclitaxel DCB in treating ISR.Methods Four patients with ISR whose clinical condition met the DCB indication were selected.According to the standard process,sufficient pre-expansion of ISR was performed first,then paclitaxel DCB dilatation was carried out to dilate the lesion segment of ISR,and no stent was implanted.Both coronary angiography and intravascular ultrasound (IVUS) were performed immediately after the treatment as well as 9 months to measure the minimum lumen area (MLA) and cross-sectional area (SA) of the stent,and the intimal hyperplasia was also been evaluated.Results In all 4 patients,angiography performed immediately after paclitaxel DCB dilatation showed that neither dissection of the dilated segment of the target artery nor obvious residual stenosis was observed.Angiography performed 9 months after the treatment revealed that all dilated segments of the target arteries were patent,and no pronounced restenosis of stent segment was seen.IVUS examination was indicated that MLA became enlarged,SA showed an increasing trend,and intimal hyperplasia showed a tendency to be inhibited.Conclusion For the treatment of ISR,pure paclitaxel DCB dilatation can obtain long-term lumen area enlargement,thus,repeated stent implantation can be avoided,which,in turn,can reduce the risk of ISR recurrence.Paclitaxel DCB dilatation can locally release paclitaxel,which has curative effect on the coronary artery wall to inhibit the excessive proliferation of intima.
ABSTRACT
Objective To determine whether the raised serum uric acid(UA)level is the independent risk factor for coronary artery disease(CAD).Methods A retrospective study was performed including 118 consecutive CAD patients(male 94,female 24)with average age of(65.79?10.03)and 67 normal angiography patients(male 43,female 24)with average age of(60.75?11.98).All the patients were performed coronary angiography from September 2003 to March 2004.In CAD group,36 cases were stable angina pectoris,28 were unstable angina and 54 were acute myocardial infarction.A fasting blood samples were collected for measurement of serum UA,blood cholesterol,and so on.And all patients were carefully inquired for their history including smoking and hypertension.Results Although raised serum UA was observed in CAD patients(372.31?100.28)mmol/L vs(340.08?81.58)mmol/L(P=0.028),logistic analysis suggested serum UA was not an independent risk factor for CAD.And there was no difference of UA among subgroups in CAD patients.Conclusion The raised serum UA may be a marker of atherosclerosis and is not an independent predictor for CAD.