Dvir Danny, Kitabata Hironori, Barbash Israel M, Minha Sa'ar, Badr Salem, Loh Joshua P, Chen Fang, Torguson Rebecca, Waksman Ron
Interventional Cardiology, MedStar Washington Hospital Center, Washington, District of Columbia.
Catheter Cardiovasc Interv. 2014 Sep 1;84(3):397-405. doi: 10.1002/ccd.25292. Epub 2013 Dec 14.
To evaluate the axial integrity of different coronary stents using intravascular ultrasound (IVUS).
Longitudinal stent deformation was recently reported.
Consecutive patients who underwent IVUS analysis after drug-eluting stent (DES) implantation for de novo coronary lesions were evaluated. Stent length was compared with label length for calculation of absolute change and relative difference (absolute change divided by label length).
A total of 233 DES utilizing five different platforms were included. The median absolute change in stent length was 0.90 mm (interquartile range [IQR] 0.48-1.39) and the relative difference was 5.24% (IQR 2.55-8.29). There was no significant difference among the groups in median absolute or relative change: Cypher 0.89 mm/3.89%, Taxus 0.88 mm/5.39%, Endeavor 1.16 mm/6.77%, Xience V 0.86 mm/5.80%, and PROMUS Element 0.79 mm/5.34% (P = 0.085, P = 0.072, respectively). Multivariate logistic regression revealed that the Cypher stent was independently correlated with a lower change in length, whereas stent label length and deployment pressure were correlated with higher absolute change.
The axial integrity of DES platforms examined in vivo was high, with only mild changes in stent length after implantation. While there are differences between first- and second-generation DES, axial integrity among second-generation DES was similar.
