Simpson Interventions Treats First Patients in Pivotal Trial of Acolyte™ Image-Guided Catheter for Complex Coronary Blockages

15 August 2025 | Friday | News

FDA-designated Breakthrough Device aims to transform treatment of chronic total occlusions by enabling real-time visualisation and precise guidewire placement, offering a safer, minimally invasive alternative for patients with limited options.

Simpson Interventions, Inc., a pioneering medical technology company specializing in cardiovascular interventional devices, announced that its groundbreaking Acolyte Image-Guided Crossing and Re-Entry Catheter System has been successfully used to treat the first patients in the Acolyte™ study, a pivotal IDE clinical trial designed to assess the safety and effectiveness of the system in treating coronary chronic total occlusions (CTOs) with persistent symptoms following medical therapy.

“Our team is thrilled to have successfully treated the first patients with the Acolyte System,” said Dr. Bill Nicholson, Director of Interventional Cardiology for Emory University and primary operator on the first cases. “The ability to clearly visualize the CTO in real-time and precisely position a guidewire with the same device potentially represents an important leap forward in efficiently and predictably treating coronary CTOs.”

“We are pleased to be the first site to treat a patient in this important trial,” added Dr. Wissam Jaber, Medical Director of Cardiac Catheterization Laboratory at Emory University Hospital and Principal Investigator for the Acolyte Study. “CTOs have long been regarded as ‘the final frontier’ of PCI due to their inherent complexity and lack of suitable devices. The Acolyte System represents a promising approach to enable interventional cardiologists to more effectively, consistently and safely treat these complex lesions, potentially allowing more patients to benefit from a minimally invasive PCI approach.”

According to the Journal of the American College of Cardiology: Cardiovascular Interventions, sixteen to twenty percent of patients with coronary artery disease have CTOs1, which occur when a coronary artery is completely blocked by plaque buildup, posing significant challenges for interventional cardiologists who currently lack effective tools to reliably cross these lesions with current standard of care options. If a CTO cannot be crossed with an interventional wire, minimally invasive revascularization options such as angioplasty and stent placement cannot be performed. Hence, many CTO patients are instead sent for invasive coronary artery bypass (CABG) surgery or are left treated with medical therapy alone. The Acolyte Real-time Image-Guided Crossing and Re-Entry Catheter System is designed to overcome the current challenges. The technology is designated by the FDA as a Breakthrough Device and has enrolled in the FDA Total Product Life Cycle Advisory Program (TAP), which is focused on developing high-quality, safe, effective, and innovative devices critical to FDA’s public health mission.

"We are excited to have enrolled the first patient in this pivotal trial for our novel technology,” said Dr. Joseph Knight, Chief Executive Officer of Simpson Interventions. “The goal for all interventional cardiologists is to treat every patient with the safest and most predictable and minimally invasive approach. We believe that the Acolyte System will provide the medical community with a valuable tool to conquer CTOs, which will, most importantly, be a win for cardiologists, hospitals, payers, and most of all, the patients.”

 

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