Effective observation of application of stent boost in coronary stent implantation

Objective To evaluate the application effect of Stent Boost( SB) in coronary stent implantation. Methods A total of 204 consecutive patients were randomly divided into the observation group( n = 102) and control group( n = 102).Coronary angiography were performed in the two group and coronary stents were implanted which were guided by coronary angiography. Diameter parameters( including maximum,minimum and average) were measured by quantitative coronary angiography( QCA),the ratio( maximum stent diameter( MaxLD)-minimum stent diameter( MinLD)) /MaxLD) was calculated.Stent visibility and the need for post dilatation was assessed at the same time. SB was performed after stent implantation and the parameters were measured in the observation group,stent visibility and the need for post dilatation was assessed. Twentysix patients in the observation group were analyzed by IVUS at the same time. Results The score of stent visibility in the observation group was lower than that of the control group( P 0. 05). Post dilation after stent implantation was performed in 48cases of the observation group and 30 cases in the control group. QCA,SB,IVUS of the two groups measured that the minimum diameter,the maximum diameter,the average diameter and stent eccentricity index had no statistical significance. Pearson correlation analysis showed that QCA and SB,QCA and IVUS,SB and IVUS were in good correlations( r = 0. 772,0. 775,0. 782,respectively,all P 0. 05). Conclusion SB increases the stent visibility and effectively guides the post dilatation. Meanwhile,SB can even take the place of IVUS in the term of measuring tent diameter.