Atheroembolism during percutaneous renal artery revascularization

Area of Science:

• Cardiovascular Medicine
• Nephrology
• Interventional Cardiology

Background:

• Atheroembolization is a suspected cause of reduced renal function after renal artery angioplasty and stenting (RA-PTAS).
• Characterizing atheroembolism during RA-PTAS with distal embolic protection (DEP) is crucial for understanding renal function outcomes.

Purpose of the Study:

• To analyze atheroembolic debris captured during RA-PTAS with DEP.
• To investigate the relationship between captured atheroembolic particles and changes in renal function.

Main Methods:

• RA-PTAS procedures were performed using DEP, with aspirated debris analyzed for particle counts.
• Estimated glomerular filtration rate (eGFR) was measured before and after RA-PTAS.
• Statistical analyses examined associations between clinical factors, particle counts, and eGFR changes.

Main Results:

• Thousands of atheroembolic particles (20-60 microm and >60 microm) were captured during RA-PTAS with DEP.
• Particle counts were associated with factors like race, predilation, stent diameter, and aspirin use.
• Higher counts of larger particles (>60 microm) were linked to a decrease in eGFR.

Conclusions:

• RA-PTAS liberates significant numbers of atheroembolic particles.
• Clinical and device-related factors can predict embolization.
• Increased embolization, particularly larger particles, is associated with impaired renal function post-RA-PTAS.