NCT05600088

Intracoronary Cryotherapy Effect on Stabilization of Vulnerable Plaque in Patients With (N)STEMI or Unstable Angina

Clinical Investigation of Intracoronary Cryotherapy Using the CryoTherapy System (CTS) for High-risk Plaque in Patients With (Non-)ST-segment Elevation Myocardial Infarction (NSTEMI) or Unstable Angina

• Status: Active Not Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 30 (estimated)
• Sponsor: Cryotherapeutics SA · Industry
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

The POLARSTAR study is an early safety and feasibility study to evaluate the performance and safety of the CryoTherapy System (CTS) for the treatment of coronary plaque lesions that are not obstructing blood flow but are at high-risk of rupture which would cause a major heart attack. The CTS is used to apply local freezing of the lesion using a balloon catheter, controlled by a console that regulates in- and outflow of a cooling agent into the catheter. The treatment is expected to stabilize the lesion, diminishing the risk of rupture. The study will enrol subjects with acute coronary disease who have suitable coronary lesions. Subjects will be followed for 1 year after the CTS treatment. Baseline identification of lesions will be done using Coronary CT-angiography (CCTA), which will be repeated at 3 and 9 months after procedure.

Detailed description

The POLARSTAR study is an early feasibility study to evaluate the safety and performance of the CryoTherapy System (CTS) medical device, consisting of a console and a balloon catheter. The CTS is designed to deliver local cryo-energy to vulnerable plaque lesions in the coronary arteries, aiming to stabilize the plaque to reduce the risk of rupture and subsequent cardiac events. The study will enrol up to 10 subjects with NSTEMI or unstable angina, who underwent successful Percutaneous Coronary Intervention (PCI) of their culprit coronary lesion, and who were identified to have presence of at least 1 non-culprit suitable plaque lesion at high-risk of rupture. After providing informed consent the subjects will undergo a Coronary CT-angiography (CCTA) to confirm suitability of the coronary plaque lesion. A single high-risk plaque lesion will be treated by the investigators, with Intra-vascular Ultrasound (IVUS) imaging prior to and after CTS treatment. Subjects will be followed clinically for up to one year after the CTS treatment, and will have follow-up CCTA assessments at 3 and 9 months post-procedure. Primary endpoint will be Major cardiac events rate at 3 months post procedure.

Conditions

• Coronary Artery Disease
• Coronary Syndrome
• Cryotherapy Effect
• Myocardial Infarction
• Myocardial Disease
• Atherosclerosis, Coronary

Interventions

Type	Name	Description
DEVICE	CryoTherapy System (CTS)	local cryotherapy of coronary high-risk plaque lesions using the CTS consisting of a semi-compliant balloon and a console controlling the temperature of cryotherapy

Timeline

• Start date: 2022-05-18
• Primary completion: 2026-06-30
• Completion: 2026-07-31
• First posted: 2022-10-31
• Last updated: 2026-03-24

Locations

5 sites across 2 countries: Georgia, Lithuania