Calcified Plaque Detachment: Alternative Calcified Plaque Modification After Coronary Intravascular Lithotripsy

Area of Science:

• Cardiovascular Medicine
• Interventional Cardiology
• Medical Imaging

Background:

• Coronary intravascular lithotripsy (IVL) is used to modify calcified plaque (CP) before stenting.
• Calcified plaque detachment (CD) and calcium fracture (CF) are known IVL complications.
• The role of CD alone in facilitating stent expansion requires further investigation.

Purpose of the Study:

• To investigate the clinical implications of IVL-induced CD.
• To assess the safety and impact of CD on lumen enlargement and stent deployment.

Main Methods:

• Optical coherence tomography (OCT) was used to assess coronary CP in 45 patients post-IVL.
• CD was defined as partial or complete separation of CP from the vessel wall.
• Patients were categorized into CD and non-CD groups for comparison.

Main Results:

• CD occurred in 49% of patients without major adverse events.
• CF was observed in 78% of patients.
• No significant difference in stent expansion index was noted between CD and non-CD groups.
• CD frequency decreased with increasing calcium arc, while CF frequency increased.

Conclusions:

• IVL-induced CD is a frequent and safe occurrence.
• CD, in conjunction with CF, contributes to CP modification.
• These findings suggest CD plays a role in facilitating lumen enlargement and successful stent deployment.