Very late outcomes of drug-eluting stents coated with biodegradable polymers: insights from the 5-year follow-up of the randomized PAINT trial

Seven-year clinical outcomes in patients undergoing percutaneous coronary intervention with biodegradable polymer coated sirolimus-eluting stent: Results from a single-center real-world experience

Objective

The aim of the present study was to assess seven-year clinical outcomes of biodegradable polymer coated Supralimus sirolimus-eluting stent (S-SES) [Sahajanand Medical Technologies Pvt. Ltd., Surat, India] in real-world patients with coronary artery disease.

Methods

This observational, retrospective study was carried out in all 346 consecutive enrolled patients who underwent percutaneous coronary intervention (PCI) with the S-SES, between April 2008 and December 2009, at a single center. We analyzed major adverse cardiac events (MACE) [a composite of cardiac death, myocardial infarction (MI), target lesion revascularization (TLR) and target vessel revascularization (TVR)] as primary outcomes at seven-year follow-up.

Results

Out of 346 patients, seven-year follow-up was obtained in 327 (94.5%) patients and hence results were analyzed for 327 patients. At seven-year, MACE occurred in 41 (12.5%) patients, consisting of 23 (7.0%) cardiac deaths, 14 (4.3%) TLR, and 4 (1.2%) TVR. The incidence of late stent thrombosis was observed in 3 (0.9%) patients. At follow-up of seven-year, the cumulative event-free survival was found to be 84.7% by Kaplan-Meier method.

Conclusions

The present study demonstrated satisfactory and sustained seven-year clinical outcomes as evidenced by the low rates of MACE and ST for the biodegradable polymer coated S-SES.

Four-year clinical follow-up of the first-in-man randomized comparison of a novel sirolimus eluting stent with abluminal biodegradable polymer and ultra-thin strut cobalt-chromium alloy: the INSPIRON-I trial

BACKGROUND

The Inspiron™ sirolimus-eluting stent (SES) is a low-dose, ultra-thin-strut cobalt-chromium stent abluminally coated with biodegradable polymers (BP). Previous results from the INSPIRON-I trial, a first-in-man study, have proven the efficacy of the novel stent in reducing neointimal proliferation. The present report aims at evaluating the long-term clinical outcomes of patients enrolled into the INSPIRON-I trial (Clinical Trials Gov. identifier: NCT01093391).

METHODS

A total of 57 patients (60 lesions) were randomly allocated in a 2:1 ratio to treatment with the Inspiron™ SES vs. its equivalent Cronus™ bare metal stent (BMS, both by Scitech Medical™, Aparecida de Goiânia, Goiás, Brazil), in four tertiary centers. The primary endpoint of the present analysis was the occurrence of major adverse cardiac events (MACE) [death, myocardial infarction (MI), target vessel revascularization (TVR) and/or target lesion revascularization (TLR)] at 4 years.

RESULTS

Baseline clinical and angiographic characteristics of both groups were similar. After 4 years, the primary endpoint occurred in 7.9% vs. 23.5% of patients in Inspiron and control groups respectively (P=0.11). The rate of death/MI was similar between the groups, but there was a significant decrease in the risk of repeat revascularization in the Inspiron group compared to the control arm TLR (0.0% vs. 23.5% respectively, P=0.02). There were no stent thromboses in the study population.

CONCLUSIONS

The novel Inspiron™ SES showed a sustained safe and effective clinical profile after 4-year of follow-up, with very low adverse events and null stent thrombosis (ST) occurrence.