Occurrence and predictors of acute stent recoil-A comparison between the xience prime cobalt chromium stent and the promus premier platinum chromium stent

Objectives: To compare the occurrence of acute stent recoil in two different stent types (platinum chromium and cobalt chromium) and identify the potential predictors of significant acute stent recoil. Background: Acute stent recoil is frequently observed after percutaneous coronary intervention and has been associated with in-stent restenosis and in-stent thrombosis. Different stent designs may result in varying degrees of stent recoil. Methods: From a registry of "all-comers" treated with either the Xience Prime Cobalt Chromium or Promus Premier Platinum Chromium stent, a random sample of 100 patients was drawn. Acute stent recoil was defined as the minimal luminal diameter (MLD) of the last inflated balloon minus the MLD after, divided by the MLD of the last inflated balloon. Significant acute stent recoil was defined as recoil ≥10%. Results: A total of 123 lesions (61 Xience Prime vs 62 Promus Premier) in 100 patients were analyzed. Acute stent recoil of 8.6±4.9% was observed in the Xience Prime group versus 8.7±4.2% in the Promus Premier group, P=0.970. In a multivariate model for significant acute stent recoil, a stent/vessel ratio ≥1 (hazard ratio 4.64 [1.94-11.12], P=0.001), a balloon/stent ratio >1 (hazard ratio 3.83 [1.12-13.14], P=0.032) and direct stenting (hazard ratio 0.42 [0.18-0.96], P=0.039) were identified as predictors. Conclusions: No significant differences were observed in the extent of acute stent recoil between the Xience Prime and the Promus Premier stent. A larger stent/vessel ratio, a larger balloon/stent ratio, and direct stenting were associated with significant acute stent recoil ≥10%.

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