Edogawa City

Researchers are evaluating the effectiveness and safety of a Double-effect kissing balloon technique (W-KBT) using Perfusion balloon (PB) and Drug coated balloon (DCB) in patients with left main coronary artery disease (LMD) who have left circumflex artery (LCx) ostium stenosis. This is a prospective, observational, multi-center study focusing on patients with stable angina, non-ST-elevation acute coronary syndrome, or unstable angina who are undergoing percutaneous coronary intervention (PCI). Patients who meet selection criteria will be enrolled and treated under usual care. The PCI procedure involves W-KBT following crossover stenting for the left main trunk to left anterior descending artery direction, proximal optimization technique (POT), and conventional kissing balloon technique (C-KBT) as the optimal treatment. Operators will obtain consent before performing PCI and will register cases continuously to assess the technique's efficacy and safety. Participants will undergo PCI with W-KBT, and data will be collected during the procedure to measure procedure success rates. Researchers will monitor major adverse cardiovascular events (MACE) within 12 months after PCI. The study will gather real-world data from multiple centers to evaluate the outcomes and safety of this treatment approach over time.