Randomized controlled study of excimer laser atherectomy for treatment of femoropopliteal in-stent restenosis: initial results from the EXCITE ISR trial (EXCImer Laser Randomized Controlled Study for Treatment of FemoropopliTEal In-Stent Restenosis)

• Published in: JACC. Cardiovascular interventions Vol. 8; no. 1 Pt A; p. 92
• Main Authors: Dippel, Eric J, Makam, Prakash, Kovach, Richard, George, Jon C, Patlola, Raghotham, Metzger, D Christopher, Mena-Hurtado, Carlos, Beasley, Robert, Soukas, Peter, Colon-Hernandez, Pedro J, Stark, Matthew A, Walker, Craig
• Format: Journal Article
• Language: English
• Published: United States 01.01.2015
• Subjects: Aged; Alloys; Amputation; Angioplasty, Balloon - adverse effects; Angioplasty, Balloon - instrumentation; Angioplasty, Balloon - mortality; Atherectomy - adverse effects; Atherectomy - instrumentation; Atherectomy - methods; Atherectomy - mortality; Chronic Disease; Combined Modality Therapy; Constriction, Pathologic; Female; Femoral Artery - physiopathology; Femoral Artery - surgery; Humans; Laser Therapy - adverse effects; Laser Therapy - instrumentation; Laser Therapy - methods; Laser Therapy - mortality; Lasers, Excimer - adverse effects; Lasers, Excimer - therapeutic use; Limb Salvage; Male; Middle Aged; Peripheral Arterial Disease - diagnosis; Peripheral Arterial Disease - mortality; Peripheral Arterial Disease - surgery; Peripheral Arterial Disease - therapy; Popliteal Artery - physiopathology; Popliteal Artery - surgery; Prospective Studies; Prosthesis Design; Recurrence; Stents; Time Factors; Treatment Outcome; United States; Vascular Patency; percutaneous transluminal angioplasty; excimer laser atherectomy; peripheral artery disease; femoropopliteal artery; in-stent restenosis; randomized controlled trial
• ISSN: 1876-7605; 1876-7605
• DOI: 10.1016/j.jcin.2014.09.009

The purpose of this study was to evaluate the safety and efficacy of excimer laser atherectomy (ELA) with adjunctive percutaneous transluminal angioplasty (PTA) versus PTA alone for treating patients with chronic peripheral artery disease with femoropopliteal bare nitinol in-stent restenosis (ISR). Femoropopliteal stenting has shown superiority to PTA for lifestyle-limiting claudication and critical limb ischemia, although treating post-stenting artery reobstruction, or ISR, remains challenging. The multicenter, prospective, randomized, controlled EXCITE ISR (EXCImer Laser Randomized Controlled Study for Treatment of FemoropopliTEal In-Stent Restenosis) trial was conducted across 40 U.S. centers. Patients with Rutherford Class 1 to 4 and lesions of target lesion length ≥4 cm, vessel diameter 5 to 7 mm were enrolled and randomly divided into ELA + PTA and PTA groups by a 2:1 ratio. The primary efficacy endpoint was target lesion revascularization (TLR) at 6-month follow up. The primary safety endpoint was major adverse event (death, amputation, or TLR) at 30 days post-procedure. Study enrollment was stopped at 250 patients due to early efficacy demonstrated at a prospectively-specified interim analysis. A total of 169 ELA + PTA subjects (62.7% male; mean age 68.5 ± 9.8 years) and 81 PTA patients (61.7% male; mean age 67.8 ± 10.3 years) were enrolled. Mean lesion length was 19.6 ± 12.0 cm versus 19.3 ± 11.9 cm, and 30.5% versus 36.8% of patients exhibited total occlusion. ELA + PTA subjects demonstrated superior procedural success (93.5% vs. 82.7%; p = 0.01) with significantly fewer procedural complications. ELA + PTA and PTA subject 6-month freedom from TLR was 73.5% versus 51.8% (p < 0.005), and 30-day major adverse event rates were 5.8% versus 20.5% (p < 0.001), respectively. ELA + PTA was associated with a 52% reduction in TLR (hazard ratio: 0.48; 95% confidence interval: 0.31 to 0.74). The EXCITE ISR trial is the first large, prospective, randomized study to demonstrate superiority of ELA + PTA versus PTA alone for treating femoropopliteal ISR. (Randomized Study of Laser and Balloon Angioplasty Versus Balloon Angioplasty to Treat Peripheral In-stent Restenosis [EXCITE ISR]; NCT01330628).