Outcomes of Drug-Eluting Stent Thrombosis After Treatment for Acute Versus Chronic Coronary Syndrome.

OBJECTIVES

The primary objective of the current analysis was to assess the association between the clinical presentation at index procedure and mortality in patients with second-generation drug-eluting stent thrombosis (G2-ST).

BACKGROUND

Patients with acute coronary syndrome (ACS) have a higher risk for stent thrombosis (ST) as compared with those with chronic coronary syndrome (CCS). However, clinical outcomes of patients with G2-ST after treatment for ACS and CCS remain poorly understood.

METHODS

From the REAL-ST (Retrospective Multicenter Registry of ST After First- and Second-Generation Drug-Eluting Stent Implantation) registry, this study evaluated 313 patients with G2-ST. According to baseline clinical presentation, patients were divided into the 2 groups: the ACS and CCS groups (n = 147 and n = 166, respectively). The primary endpoint was the cumulative 3-year incidence of all-cause death after the index ST events. Timing of ST, target lesion revascularization, and recurrent ST were also assessed.

RESULTS

Early ST was more frequently observed in the ACS group (71.4% vs. 44.6%), while very late ST was less likely to occur in the ACS group than in the CCS group (11.6% vs. 30.7%). Cumulative 3-year incidence of all-cause death after the index ST events was comparable between the ACS and CCS groups (28.6% vs. 28.3%; hazard ratio: 1.14; 95% confidence interval: 0.75 to 1.73; p = 0.55). Compared with the CCS group, the ACS group showed higher incidences of target lesion revascularization and recurrent ST (23.8% vs. 17.2%; p = 0.06; and 9.9% vs. 1.4%; p = 0.001, respectively).

CONCLUSIONS

Patients with G2-ST were associated with higher mortality irrespective of baseline clinical presentation.