The Pt-Cr everolimus-eluting stent with bioabsorbable polymer in the treatment of patients with acute coronary syndromes. Results from the SYNERGY ACS registry

Efficacy and Safety of TiNO-Coated Stents versus Drug-Eluting Stents in Acute Coronary Syndrome: Systematic Literature Review and Meta-Analysis

(1) Background: Practice guidelines define drug-eluting stents (DES) as the standard of care in coronary percutaneous coronary intervention (PCI), including in acute coronary syndrome (ACS). This is based on comparisons with bare-metal stents (BMS). However, non-drug-eluting titanium-nitride-oxide-coated stents (TiNOS) have not been taken into account. The objective of this study is to determine whether TiNOS can be used as an alternative to DES in ACS. (2) Methods: A prospective systematic literature review (SLR), conducted according to the PRISMA guidelines, was performed, wherein multiple literature databases from 2018 and 2022 were searched. Prospective, randomised, controlled trials comparing outcomes after PCI with TiNOS vs. DES in any coronary artery disease (CAD) were searched. Clinical outcomes were meta-analytic pooled risk ratios (RR) of device-oriented Major Adverse Cardiac Events (MACE) and their components. The analysis stratified outcomes reported with ACS-only vs. ACS jointly with chronic coronary syndrome (CCS). (3) Results: Five RCTs were eligible, comprising 1855 patients with TiNOS vs. 1363 with DES at a 1-year follow-up. Three enrolled patients presented with ACS only and two with ACS or CCS. The latter accounted for most of the patients. The one-year pooled RRs in those three RCTs were as follows: MACE 0.93 [0.72, 1.20], recurrent myocardial infarction (MI) 0.48 [0.31, 0.73], cardiac death (CD) 0.66 [0.33, 1.31], clinically driven target lesion revascularization (TLR) 1.55 [1.10, 2.19], and stent thrombosis (ST) 0.35 [0.20, 0.64]. Those results were robust to a sensitivity analysis. The evidence certainty was high in MACE and moderate or low in the other endpoints. (4) Conclusions: TiNOS are a non-inferior and safe alternative to DES in patients with ACS.

XLIMus drug eluting stent: A randomIzed controlled Trial to assess endothelialization. The XLIMIT trial

BACKGROUND

Thin strut 3rd generation drug eluting stents offer the potential advantage over the previous generation of better technical performance and reduced neointimal proliferation parameters, which are linked to mid and late term device failure.

AIM

To evaluate the performance of the Xlimus sirolimus-eluting stent (SES) against the Synergy everolimus-eluting stent (EES) in terms of device reendothelialization in patients undergoing PCI for coronary artery disease (CAD).

METHODS

XLIMIT is a multicenter randomized controlled trial targeting 180 patients requiring percutaneous coronary interventions (PCI). Patients will be treated with Xlimus SES or Synergy EES implantation and randomization will be performed in a 2:1 ratio. The primary endpoint will be the reendothelialization grade of the Xlimus stent in terms of strut coverage and neointimal hyperplasia volume as compared to Synergy. Secondary endpoints will be represented by clinical and procedural outcomes. The first patient was enrolled on February 2019.

CONCLUSIONS

A clearer understanding of the endothelialization process of new generation DES could significantly impact the treatment with dual antiplatelet therapy in the future. Moreover, although not powered for clinical end-points, the XLIMIT trial will provide randomized data in a population with minimal exclusion criteria.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier: NCT03745053. Registered on November 19, 2018.