Safety and Efficacy of Paclitaxel Coated PTCA Balloon Catheter With a Shellac Plus Vitamin E Excipient (GENOSS® DCB) in Patients With Coronary In-stent Restenosis (ISR): A Prospective, Multi-center, Observational Study

This study includes patients with coronary in-stent restenosis (ISR) who have undergone percutaneous coronary intervention (PCI) according to standard treatment protocols using the Genoss® DCB and have agreed to participate in the clinical research. The decision on which drug-coated balloon (DCB) to use during PCI is entirely based on the patient's condition and the characteristics of the coronary lesions identified through angiography. Thus, it's not possible to determine in advance to use the Genoss® DCB before the procedure, nor can the number of drug-coated balloon catheters to be used during the procedure be known or decided upon beforehand.