# Rotational vs. laser atherectomy in Chinese CTO-PCI: lesion-specific efficacy with comparable midterm safety

## TL;DR

This study compares two techniques for treating blocked coronary arteries in Chinese patients, finding each is better for specific types of blockages but equally safe.

## Contribution

The study provides lesion-specific insights into the efficacy of ELCA and RA in Chinese CTO-PCI patients.

## Key findings

- ELCA is more effective for ISR-CTO and long lesions, while RA is better for calcified lesions.
- Both techniques have comparable procedural success and midterm safety.
- ELCA has higher costs due to laser catheter expenses but similar costs when excluding catheters.

## Abstract

Chronic total occlusion (CTO) percutaneous coronary intervention (PCI) often requires plaque modification for device delivery. While rotational atherectomy (RA) and excimer laser coronary atherectomy (ELCA) are established adjuncts, their comparative efficacy and safety remain underexplored in Chinese populations.

This single-center retrospective study included 75 consecutive CTO-PCI patients treated with ELCA (n = 25) or RA (n = 50). Procedural success, complications, and major adverse cardiovascular and cerebrovascular events (MACCE) were analyzed over a median 17.5-month follow-up. Multivariable Cox regression adjusted for calcification severity, lesion length, ISR-CTO, and diabetes mellitus.

RA was preferred for moderate/severe calcification (76% vs. 48%, p = 0.020), while ELCA dominated in ISR-CTO (20% vs. 2%, p = 0.024) and lesions >20 mm (56% vs. 30%, p = 0.044). Procedural success was comparable (RA 90% vs. ELCA 84%, p = 0.706). Procedure-related complications differed: RA had two coronary perforations (4% vs. 0%, p = 0.130), whereas ELCA showed a trend toward more transient slow/no-reflow (12% vs. 0%, p = 0.061). MACCE rates remained similar (19% vs. 13.3%, p = 0.815; adjusted HR 1.53, 95% CI 0.35–6.65, p = 0.569). Both techniques exhibited comparable procedural duration and radiation exposure (all p > 0.05). ELCA incurred higher total costs (US11,147 vs. 9,267, p = 0.007), driven by laser catheter expenses; however, procedural costs became comparable after excluding catheter-related expenditures (p = 0.210).

In Chinese CTO-PCI, ELCA and RA demonstrate lesion-specific utility—ELCA for ISR-CTO and long lesions, RA for calcified lesions—with comparable midterm safety. Procedural costs of ELCA and RA were equivalent in Device-excluded costs analysis.