Abstract
BACKGROUND: Despite the excellent success and safety of intravascular lithotripsy (IVL) in heavily calcified lesions, evidence in acute coronary syndromes (ACS) remains limited. AIMS: This study aimed to evaluate the procedural and clinical outcomes of IVL in heavily calcified ACS. METHODS: Patients who underwent IVL between 2019 and 2024 from the ongoing prospective BENELUX registry were eligible for inclusion. Patients were therefore classified in ACS and chronic coronary syndrome (CCS) groups. The primary technical endpoint was angiographic success < 30%, defined as the successful delivery of the IVL catheter across the target lesion and delivery of IVL pulses without angiographic complications and residual target lesion less than 30%. The primary clinical endpoint was in-hospital major adverse cardiac events (MACE), including cardiac death, nonfatal myocardial infarction, or target lesion revascularization. RESULTS: A total of 454 patients underwent IVL, with 251 (55.3%) treated for CCS and 203 (44.7%) for ACS. The median SYNTAX score (p-value 0.17), the need for inotropes (p-value 0.09), and the use of mechanical circulatory support (p-value 0.71) were similar between CCS and ACS groups. Comparable angiographic success (< 30% residual stenosis) was observed between CCS and ACS groups (90.1% vs. 91.1%, p = 0.69). MACE were similar across groups during hospital stays (CCS 1.6% vs. ACS 3.0%, p = 0.33), at 30 days (CCS 3.2% vs. ACS 3.9%, p = 0.86), and at 12-month follow-up (CCS 8.4% vs. ACS 7.9%, p = 0.91). CONCLUSION: IVL provides high procedural success and consistent clinical outcomes in both CCS and ACS cases.