Outcomes of Chronic Total Occlusion Percutaneous Coronary Intervention in Patients With Diabetes: Insights From the OPEN CTO Registry

Abstract

ObjectivesFew studies have evaluated the relationship of diabetes with technical success and periprocedural complications, and no studies have compared patient-reported health status after chronic total occlusion (CTO) percutaneous coronary intervention (PCI) in patients with and without diabetes. BackgroundCTOs are more common in patients with diabetes, yet CTO PCI is less often attempted in patients with diabetes than in patients without. The association between diabetes and health status after CTO PCI is unknown. MethodsIn the 12-center OPEN-CTO PCI registry (Outcomes, Patient Health Status, and Efficiency in Chronic Total Occlusion Registry), patients with and without diabetes were assessed for technical success, periprocedural complications, and health status over 1 year following CTO PCI using the Seattle Angina Questionnaire and the Rose Dyspnea Scale. Hierarchical modified Poisson regression was used to examine the independent association between diabetes and technical success, and hierarchical multivariable linear regression was used to assess the association between diabetes and follow-up health status. ResultsDiabetes was common (41.2%) and associated with a lower crude rate of technical success (83.5% vs. 88.1%; p = 0.04). After adjustment, there was no significant difference between diabetic and nondiabetic patients (relative risk: 0.96, 95% confidence interval: 0.91 to 1.01). There were no significant differences in complication rates between patients with and without diabetes. Angina burden, quality of life, and overall health status scores were similar between diabetic and nondiabetic patients over 1 year. ConclusionsAlthough technical success was lower in patients with diabetes, this reflected lower success among patients with prior bypass surgery, without any significant difference in success rate after adjusting for prior bypass and disease complexity. CTO PCI complication rates are similar in diabetic and nondiabetic patients, and symptom improvement following CTO PCI is robust and of a similar magnitude regardless of diabetes status.