Short- and long-term follow-up of antithrombotic management patterns in patients hospitalized with acute coronary syndrome: Indian subgroup of EPICOR Asia study

Abstract

Background: Acute coronary syndrome (ACS) is associated with emergency hospitalizations, and there are limited real-world data on clinical outcomes in post-ACS Asian patients. This article presents data on the Indian subgroup from the Long-term Follow-up of Antithrombotic Management Patterns in Acute Coronary Syndrome Patients in Asia (EPICOR-Asia) study.

Methods: EPICOR included patients with ACS [ST-segment elevation myocardial infarction (STEMI), non-ST-segment elevation myocardial infarction (NSTEMI), or unstable angina (UA)]. The study had two phases: acute phase and follow-up phase. The primary objective was to describe short- and long-term antithrombotic management patterns.

Results: EPICOR-India enrolled 2468 patients (STEMI-1482; NSTEMI-562; and UA-424). Cardiovascular risk factors were present in 1362 (55.2%) patients. Prehospital care was received by 879 (35.6%) patients, and the median time from the symptom onset to the first medical attention was 3 h (0.08, 100.33). The most common drug regimen prescribed during the acute phase was ≥2 antiplatelet agents + anticoagulants with no glycoprotein IIb/IIIa inhibitors and at discharge were aspirin + clopidogrel. About 78.8% of patients were discharged on dual antiplatelet therapy (DAPT) and 16%, on single antiplatelet therapy (SAPT). At 23 months after discharge, 55.6% were on DAPT, while 16.4% were on SAPT. Postdischarge outcomes at 2 years included death in 165 (6.7%) patients, composite events of death, myocardial infarction (MI), or ischemic stroke in 182 (7.4%) patients, and bleeding events in seven (0.3%) patients.

Conclusion: This study showed a gap between international recommendations and implementation for managing ACS in Indian patients. Most of the patients prefer to undergo invasive management instead of non-invasive therapy. At the end of the 2-year follow-up, more than half of the population was receiving DAPT, with most patients on receiving a combination of aspirin and clopidogrel. The mortality along with composite events of death, MI, or ischemic stroke was highest for patients with NSTEMI.

Keywords: ACS; Antithrombotic; DAPT; EPICOR- India; Myocardial infarction; NSTEMI; STEMI.

Fig. 1

Study design.

Fig. 2

Incidence of cardiovascular events (A) and bleeding events (B) in patients with STEMI, NSTEMI, and UA over the 2-year follow-up period. STEMI, ST-segment elevation myocardial infarction; NSTEMI, non–ST-segment elevation myocardial infarction; UA, unstable angina.