Are Coronary Calcium-Modifying Techniques Levelling the Playfield?

Area of Science:

• Cardiovascular Medicine
• Interventional Cardiology
• Biomedical Engineering

Background:

• Heavily calcified coronary arteries pose significant challenges during percutaneous coronary intervention (PCI).
• Severe calcification impedes device delivery, limits stent expansion, and increases risks of stent thrombosis, restenosis, and adverse clinical outcomes.
• Approximately 20% of PCI patients have severe calcification, a predictor of poor mid-term prognosis.

Purpose of the Study:

• To review recent advances in assessing and managing heavily calcified coronary lesions during PCI.
• To discuss emerging technologies and their impact on procedural strategies and outcomes.
• To highlight the need for further research to establish long-term clinical benefits.

Main Methods:

• Review of current intracoronary imaging modalities (IVUS, OCT) for calcium assessment.
• Discussion of various calcium-modifying techniques: cutting/scoring balloons, atherectomy (rotational, orbital, laser), and intravascular lithotripsy.
• Analysis of existing evidence from meta-analyses and trials regarding procedural and clinical outcomes.

Main Results:

• Intracoronary imaging enhances precise detection and characterization of calcium burden, guiding procedural strategy.
• A range of devices (balloons, atherectomy, lithotripsy, laser) offer options for plaque modification, each with specific applications and risks.
• Current evidence primarily supports procedural success, with limited data on definitive long-term clinical endpoint improvement.

Conclusions:

• Advanced imaging and diverse calcium-modifying technologies offer improved management of calcified lesions in PCI.
• The superiority of any single technique is not yet established, and most studies are underpowered.
• Further large-scale randomized trials are crucial to validate the clinical efficacy of these strategies in mitigating the adverse impact of coronary calcification.