Outcomes by race and ethnicity in patients undergoing percutaneous coronary intervention of chronic total occlusion

Abstract Background Percutaneous coronary intervention (PCI) of chronic total occlusion (CTO) carries increased risk for worse outcome. There is limited data on whether race and/or ethnicity affect outcomes. Materials and methods We included patients who underwent CTO intervention from 2012 to 2017 at The Mount Sinai Hospital (New York). Data were collected prospectively but examined retrospectively. The patients were stratified by race/ethnicity in Caucasians, African Americans, Asians and Hispanics. The primary end point was major adverse cardiac events (MACE) defined as the composite of death, myocardial infarction (MI), and target vessel revascularization (TVR) at 1 year follow-up. Secondary outcomes included individual components of the MACE (death, MI or TVR), and bleeding. Results A total 1,684 patients were included of which (49.8%) were Caucasians, 168 (10%) were African Americans, 396 (23.5%) were Asians and 281 (16.7%) were Hispanics. African Americans had the highest proportion of female patients (39%) and more often had a history of smoking (26.2%) and insulin-dependent diabetes mellitus (46.6%) compared to the other groups. They had the highest prevalence of in-stent restenosis as the target lesion (Table 1). Caucasians were older (65.9±11.1 years) with more calcified lesions and longest lesion length compared to the other groups. Asians had highest prevalence of multi-vessel coronary disease. Caucasians and Asians had higher Syntax score and more stents implanted. Procedural success was similar between the groups (Table 1). Adjusted analyses did not show any differences in clinical outcomes between groups (Table 2). Conclusion In spite of many differences between racial/ethnical groups in baseline and procedural characteristics, procedural success of CTO intervention and 1-year MACE rates were similar between groups.Procedural characteristicsAdjusted 1-year outcomes