Long-term dual antiplatelet treatment and bleeding complications in diabetic patients treated with drug eluting stent implantation

• We examine the impact of antiplatelet treatment on bleeding after DES implantation.
• Dual antiplatelet treatment will increase overall and minor bleeding.
• Dual antiplatelet treatment is not associated with major bleeding complications.
• Bleeding is not associated with major adverse cardiovascular events.
• Smoking may have a significant role in the occurrence of bleeding.

BackgroundDual antiplatelet treatment (DAPLT) for at least 12 months is recommended after drug eluting stent (DES) implantation, but concerns regarding the extended use of this treatment persist due to increased risk of bleeding. In this study are assessed the incidence, correlates, and clinical significance of bleeding complications in diabetic patients after long-term DAPLT post DES implantation.MethodsWe studied 610 consecutive diabetic patients after DES implantation. The primary end point was the occurrence of any bleeding according to the BARC and TIMI definitions.ResultsThe incidence of overall bleeding was higher in patients on DAPLT (21.1% vs. 4.4%, p < 0.001); minor/minimal according to the TIMI definition, and type 1 or 2 according to the BARC definition, were more frequently observed in patients on DAPLT (20.3% vs. 3.0%, p < 0.001, 15.6% vs. 2.0%, p < 0.001 and 4.4% vs. 0.5%, p = 0.034, respectively), whereas there was no effect on type 3 (3.5% vs. 2.0%, p = ns). DAPLT was an independent predictor for overall (HR 5.35, 95% CI: 2.69–10.67, p < 0.001), minor (HR 7.45, 95% CI: 3.25–17.12, p < 0.001, for TIMI classification) and type 1 or 2 bleeding (HR 8.17, 95% CI 3.29–20.25, p < 0.001); furthermore smoking was also predictor for overall bleeding (HR 1.65, 95% CI: 1.05–2.61, p = 0.030). Cardiovascular adverse events were not more frequent in patients with bleeding as compared with those without bleeding.ConclusionsLong-term DAPLT in diabetic patients after DES implantation is associated with higher risk of overall and minor but not major bleeding; smoking may have a significant role in the occurrence of bleeding complications.