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and objectives: The PSP (pre-dilation, sizing and post-dilation) score, derived from the GHOST-EU registry, has evaluated the relationship between the implantation technique of bioresorbable scaffolds and the clinical outcomes. The objective was to perform an external validation of the PSP technique and to determine its effect on adverse cardiac events in various clinical and anatomical scenarios. Methods: Data from the REPARA registry (2230 patients) were used for external validation, whereas a common database combining REPARA and GHOST-EU (3250 patients) data was used to evaluate the effect of PSP technique in various clinical and anatomical scenarios. PSP-1 and PSP-3 were used to score the appropriateness of pre-dilation, scaffold sizing, and post-dilation. The primary endpoint was 1-year device-oriented composite endpoint of cardiac death, target-vessel myocardial infarction, and target-lesion revascularization. The definite/probable scaffold thrombosis according to the Academic Research Consortium criteria was also evaluated. Results: A total of 303 (18.2%) patients were treated with an optimal PSP-1, and 182 (8.2%) with an optimal PSP-3. The external validation showed that PSP has a very high negative predictive value for device-oriented composite endpoint and scaffold thrombosis (91.8% and 89.1% for PSP-1; 98.4% and 97.3% for PSP-3, respectively). Patients with an optimal PSP-3 had a numerically lower rate of device-oriented composite endpoint and scaffold thrombosis compared to those without it (0.5% vs 2.9%; P = .085 and 0.5% vs 1.8%; P = .248, respectively). In the merged database, PSP benefits were seen on many scenarios, except in the 84 L. Ortega-Paz et al. REC Interv Cardiol. 2019;1(2):83-91

Effect of implantation technique on outcomes in patients receiving bioresorbable scaffolds in various clinical scenarios