Enhancing Coronary Intervention Outcomes Using Intravascular Ultrasound: Analysis of Long-Term Benefits in a Japanese...

Area of Science:

• Cardiovascular Medicine
• Interventional Cardiology
• Medical Imaging

Background:

• Intravascular ultrasound (IVUS) use during percutaneous coronary intervention (PCI) is known to improve outcomes but is inconsistently applied.
• Japan has a high rate of IVUS utilization during PCI.

Purpose of the Study:

• To assess the association between IVUS-guided PCI and long-term clinical outcomes in a Japanese population.
• To evaluate the effectiveness of IVUS in complex coronary anatomy cases.

Main Methods:

• Analysis of 8721 patients from a multicenter PCI registry.
• Primary outcome: composite of death, acute coronary syndrome, heart failure admission, or coronary artery bypass grafting at 2 years.
• Inverse probability-weighted analysis and subgroup analysis for complex coronary anatomy.

Main Results:

• 83.8% of patients underwent IVUS-guided PCI.
• Adjusted analysis showed IVUS significantly reduced death (HR 0.73) and coronary bypass (HR 0.62).
• In complex anatomy subgroups, IVUS significantly reduced the primary outcome risk (HR 0.72) and components like death, bypass, and heart failure.

Conclusions:

• High utilization of IVUS in Japan is associated with improved clinical outcomes.
• IVUS-guided PCI demonstrates a potential benefit in reducing mortality and the need for coronary bypass surgery.
• The benefits of IVUS are particularly pronounced in patients with complex coronary anatomy.