Background: We investigated whether drug-coated balloon (DCB) treatment is effective for all de novo cases of coronary artery disease (CAD) in patients with diabetes mellitus. Furthermore, we also investigated the relationship between the degree of diabetes mellitus and clinical outcomes after DCB treatment.

Methods: In this study, we included 516 consecutive patients with de novo CAD who were treated with DCB. The patients were divided into the diabetic and non-diabetic groups. Patients with diabetes mellitus were further classified into non-insulin-treated diabetes mellitus (NITDM) and insulin-treated diabetes mellitus (ITDM). The primary endpoints were major adverse cardiovascular ischemic events (MACE) and clinically driven target lesion revascularization (CD-TLR).

Results: Within a mean clinical follow-up period of 2.5 years, the incidence of MACE among patients with diabetes mellitus (22.1%) was almost twice that of non-diabetic patients (11.9%) with a relative risk of 1.86 (95% CI 1.24-2.79, p = 0.002). The 3-year CD-TLR occurred in 28 patients with diabetes mellitus (10.6%) and 13 non-diabetic patients (5.1%, p = 0.02). ITDM patients had a significantly higher rate of MACE compared with non-diabetic patients with a relative risk of 2.86 (95% CI 1.76-4.63, p = 0.0002). ITDM remained an independent predictor of 3-year MACE with an odd ratio of 1.96 (95% CI 1.00-3.83, p = 0.05).

Conclusion: In patients undergoing DCB, the presence of DM was associated with a higher risk of MACE and CD-TLR. Particularly in DCB, treatment was still inadequately effective for ITDM patients.

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http://dx.doi.org/10.1007/s00380-024-02470-xDOI Listing

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