Introduction: The efficiency of drug-coated balloon (DCB) percutaneous coronary intervention (PCI) has been shown for in-stent restenosis (ISR) and native small-vessel disease, with available data showing similar outcomes in both chronic kidney disease (CKD) and non-CKD patients (1). The aim is to compare the incidence of target lesion restenosis at follow-up (FUP) coronary angiography in patients with and without CKD receiving DCB PCI.
Patients and Methods: The registry included patients undergoing a DCB PCI at the University Hospital Centre Zagreb from February 2011 to January 2023 (n=652). Patient demographics, comorbidities, pharmacotherapy, as well as data on the initial and FUP coronary angiography/PCI was collected. Chronic kidney disease was defined as estimated glomerular filtration rate < 45 ml/min/1.73m2. A FUP angiography was performed in 49% of patients (n=317), with a median FUP of 6 (interquartile range 3 - 18) months, without difference between groups.
Results: Data is shown inTable 1. The cohort was 75% male, mean age 65 ± 10 years. CKD was present in 9% (n=57) of patients and was associated with a higher incidence of arterial hypertension, diabetes mellitus, atrial fibrillation, as well as peripheral artery disease. The age difference was noted between groups, with CKD patients being older on average. At initial PCI, more CKD patients had multivessel coronary disease, with a higher rate of ISR as the indication for DCB, that was not statistically significant (CKD vs non-CKD: 46% vs 34%, p=0.075). After DCB, no difference was noted between groups in regards to the need for a bail-out PCI (9% VS 6%, P=0.375). FUP was performed in an equal percentage of patients in both groups (48% vs 51%, p=0.769), with no differences seen in the incidence of restenosis (17% vs. 18%, p=0.998), the need for target lesion PCI (17% vs. 13%, p=0.533), or the use of anti-anginal drugs.
Conclusion: The findings of our single-centre analysis show that patients with CKD do not have a higher risk of target lesion restenosis after DCB PCI, when compared to the non-CKD group, which is in accordance with currently available evidence (2).