Success rates of percutaneous coronary intervention of chronic total occlusions and long-term survival in patients with diabetes mellitus

Abstract

The objectives of this study were to evaluate angiographic and clinical outcomes among patients with diabetes mellitus (DM) who underwent percutaneous coronary intervention (PCI) for a chronic total occlusion (CTO). We compared them with matched patients undergoing PCI of a non-CTO lesion. All patients had documented DM. Matching was performed using a propensity score for CTO.

There were 506 patients with DM and CTO who were matched with a non-CTO group. Results showed that angiographic success rates were lower with CTO (75% vs. 93%, p<0.001). In-hospital major adverse cardiac event (MACE Â death, urgent bypass surgery, Q-wave myocardial infarction or target vessel revascularisation) rates were equivalent (CTO 3.2% vs. non-CTO 2.6%, p=0.57). Survival was not different five years after revascularisation of CTO (75%) vs. non-CTO (79%) (p=0.20). In addition, when DM patients with CTO were analysed according to angiographic success of PCI, there were no significant differences in either in-hospital (success 1.6% vs. failure 2.4%, p=0.7) or 1-year mortality (success 22.2% vs. failure 26.8%, p=0.3).

We conclude that PCI of CTO is safe in patients with DM. Angiographic failure is not associated with an increase in MACE rates or mortality as compared to matched nonCTO patients. However, there is not a measurable improvement in survival in this DM-CTO population.

Keywords

percutaneous coronary intervention chronic

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