Intracoronary Cryotherapy Effect on Stabilization of Vulnerable Plaque in Patients With Stable Angina or ACS - A Traditional Feasibility Study

Recruiting now · Not applicable

Conditions studied: Coronary Arterial Disease (CAD), Plaque, Vulnerable Plaque, Cryotherapy, Cryotherapy Effect, Coronary Balloon, Atherosclerosis Coronary Artery With Angina Pectoris

In brief

ICECAP is a multi-centre, prospective, single-arm, interventional, traditional feasibility clinical investigation to evaluate the efficacy and safety of intra-coronary cryotherapy on vulnerable or high-risk plaque (HRP), using the CryoTherapy System (CTS). The study aims to enroll 25 patients with symptomatic coronary artery disease, successfully treated for their culprit lesion and with presence of at least one HRP lesion in another vessel. Eligible patients will undergo cryotherapy during a planned procedure. Near-infrared spectrometry (NIRS and Optical Coherence Tomography imaging will be used during baseline procedure, and during a 9 months follow visit. The primary endpoint is reduction of plaque burden measured as 30% reduction in maxLCBI4mm as measured by NIRS at 9 months post procedure.

Key facts

Study ID

NCT06939374

Run by

Cryotherapeutics SA

People needed

30

Starts

2025-03-01

Expected to finish

2027-06-30

Last updated by the study team

2026-04-06

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• 1) Subject is at least 18 years old. 2) Subject has acute cardiac pain/angina consistent with stable angina or acute coronary syndrome eligible for coronary angiography meeting one of the following criteria:
• Non-ST-segment elevation myocardial infarction (NSTEMI) with rise/fall of cardiac enzymes (troponin I or T) with at least one value above the 99th percentile of the upper reference limit requiring PCI within 72 hours from diagnosis
• Unstable angina
• ST-segment elevation myocardial infarction (STEMI) 3) Successful PCI (defined as diameter stenosis less than 30% and TIMI 3 flow on final angiography without procedural complication) of the culprit lesion.
• NOTE: subjects with unstable angina, for whom the culprit lesion as assessed by investigator does not require PCI currently or within the next 6 months (subject treated with optimal medical treatment) can be enrolled in the study.
• Subject has at least one high-risk plaque meeting the criteria below:
• Located in a non-culprit vessel,
• High-risk plaque lesion on CCTA and at least one of the following features:
• Presence of low-attenuation plaque (HU<50) and/or
• Positive remodelling (remodelling index >1.1) and/or
• Napkin ring sign and/or
• Plaque burden ≥70%
• Lesion length ≤ 20 mm.
• Diameter stenosis on invasive angiography between 30% and 70% on coronary angiogram or negative physiology assessment (FFR>0.80 or NHPR>0.89).
• Reference vessel diameter (RVD) < 3.75 mm and > 2.50 mm in diameter
• Investigator considers that lesions are accessible.
• If more than two suitable lesions available, investigator will select the most appropriate lesion for cryotherapy treatment.
• maxLCBI4mm in the lesion > 324.7 6) Subject is able to provide consent and has signed and dated the informed consent form.

You may not qualify if…

• 1) Subject is hemodynamically unstable (cardiogenic shock, hypotension needing inotropes, hypoxia needing intubation, refractory ventricular arrhythmias, and IABP).
• Subject has ongoing ST-segment elevation myocardial infarction. 3) Subject had a procedural complication during the ACS PCI procedure. 4) Subject has history of Coronary Artery Bypass Graft (CABG) or planned CABG within 12 months after the index procedure.
• Subject has known reduced Left Ventricular Ejection Fraction < 30%. 6) Subject has known severe valvular heart disease. 7) Subject has known severe renal insufficiency (eGFR <30 ml/min/1.72 m2). 8) Subject has any life-threatening conditions or medical comorbidity resulting in life expectancy < 12 months.
• Subject is currently participating in another clinical investigation that has not yet reached its primary endpoint.
• Subject has severe peripheral vascular disease impeding femoral artery access.
• Subject is pregnant or lactating, or NOT surgically sterile (tubal ligation or hysterectomy) or NOT postmenopausal for at least 6 months or is a female with childbearing potential without effective contraception (pill, patch, ring, diaphragm, implant and intrauterine device).
• Angiographic exclusion criteria:
• Visible distal embolization/no-reflow following culprit lesions PCI.
• Left main coronary artery disease (visual diameter stenosis > 50%).
• Stent thrombosis/restenosis as a culprit lesion.
• CTS lesion involving a bifurcation (defined as lesions involving side branches >2.0 mm).
• Angiographic or CCTA evidence of severe calcification and/or marked tortuosity of the index vessel and/or lesion.
• Thrombotic lesions.
• Ostial lesions.

Where it is running

• AZORG Aalst — Aalst, Belgium (enrolling)
• St Bartholomew's Hospital — London, United Kingdom
• Royal Brompton Hospital — London, United Kingdom

Full record on ClinicalTrials.gov

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