Early Feasibility Study of Surgical Implantation of a Polymer Prosthetic Mitral and Aortic Valve

Официальное название

A Prospective Early Feasibility Clinical Study of Surgical Implantation of a Polymer Prosthetic Heart Valve

Обзор

The goal of this clinical trial is to explore the early feasibility, initial safety, and efficacy of surgical implantation of a polymer prosthetic heart valve in patients requiring either mitral valve replacement or aortic valve replacement. The main question it aims to answer is: \-- What is the rate of valve-related complications, including thromboembolism, valve thrombosis, severe perivalvular leak, severe bleeding, and endocarditis, at 12 months post-operation? Participants will undergo: * Surgical implantation of a polymer prosthetic valve (mitral valve replacement for mitral valve group and aortic valve replacement for aortic valve group). * Regular follow-up visits at 30 days, 3-6 months, and 12 months post-operation to evaluate clinical outcomes, including echocardiographic assessment and clinical event monitoring.

Подробное описание

This is a prospective, exploratory, single-center clinical study designed to assess the early feasibility and initial safety of an investigational polymer prosthetic heart valve. A total of 10 patients will be enrolled, with 5 patients assigned to the mitral valve replacement group and 5 patients to the aortic valve replacement group.

Primary outcomes include the occurrence of valve-related complications within 12 months, such as thromboembolism, valve thrombosis, severe perivalvular leak, severe bleeding, and endocarditis.

Secondary outcomes include immediate device success rate, valve hemodynamic performance, comprehensive safety event evaluations (e.g., all-cause mortality, all-cause reoperation, valve extraction, and structural or non-structural valve dysfunction), cardiac functional classification (NYHA), and quality of life assessments (Kansas City Cardiomyopathy Questionnaire, KCCQ).

Eligible participants are patients requiring mitral or aortic valve replacement, capable of undergoing extracorporeal circulation and anticoagulation therapy, and who have provided informed consent.

Exclusion criteria include patients with prior valve replacement surgery (except transcatheter mitral valve edge-to-edge repair), urgent/emergency procedures, significant comorbidities (e.g., recent stroke or myocardial infarction, severe liver/kidney dysfunction, active infections), severe coagulation disorders, allergies to valve materials, substance abuse issues, psychiatric disorders, or anticipated life expectancy under 12 months. Patients who drop out after valve implantation will not be replaced.

Вмешательства

• Устройство Polymer Prosthetic Heart Valve
  Surgical implantation of polymer prosthetic valve.

Первичные конечные точки

• 12-Month Incidence of Valve-related Complications [Срок оценки: 12 months post-operation]

Вторичные конечные точки (7)

• Immediate Device Success Rate [Срок оценки: Immediately post-operation]
• Valve Hemodynamic Performance 1 Mean Transvalvular Gradient at 12 months [Срок оценки: 12 months post-operation]
• Valve Hemodynamic Performance2 Effective Orifice Area (EOA) at 12 months [Срок оценки: 12 months post-operation]
• Safety Outcomes and Adverse Events [Срок оценки: Up to 12 months post-operation]
• Cardiac Function Classification (NYHA) [Срок оценки: 12 months post-operation]
• Kansas City Cardiomyopathy Questionnaire (KCCQ) Overall Summary Score at 12 months [Срок оценки: 12 months post-operation]
• Valve Hemodynamic Performance 3 Paravalvular Leakage Severity at 12 months [Срок оценки: 12 months post-operation]

Критерии участия

Критерии включения

• Adults requiring surgical replacement of either mitral or aortic valve
• Capable of undergoing cardiopulmonary bypass
• Able to tolerate anticoagulation therapy
• Able to understand study purpose, willing to provide informed consent and comply with follow-up

Критерии исключения

• History of previous cardiac valve surgery or percutaneous valve replacement, including surgical aortic or mitral valve replacement (excluding Percutaneous Balloon Mitral Valvuloplasty \[PBMV\], which is permitted).
• Requirement for urgent or emergency cardiac surgery.
• Planned concurrent aortic valve surgery or combined valve procedure (e.g., simultaneous aortic and mitral valve surgery).
• Scheduled coronary artery bypass graft (CABG) during the same admission.
• Anticipated need for additional non-valve cardiac surgery within 12 months.
• Active systemic infection, including pneumonia or infective endocarditis.
• Intracardiac thrombus detected on echocardiography or imaging.
• Stroke or transient ischemic attack within the prior 3 months.
• Myocardial infarction, unstable coronary syndrome, or coronary revascularization within the prior 3 months.
• Severe comorbidities with expected life expectancy <12 months, including Child-Pugh C liver disease, end-stage malignancy, or advanced pulmonary disease.
• Participation in another interventional clinical trial involving investigational devices or drugs.
• Anatomical risk factors such as ascending aortic aneurysm (≥50 mm), bicuspid aortic valve with ascending aorta ≥45 mm, or other high-risk features identified on imaging.
• Left ventricular ejection fraction (LVEF) ≤35%, indicating severe systolic dysfunction.
• Severe renal insufficiency, e.g., estimated GFR <30 mL/min/1.73 m² or requirement for chronic dialysis.
• Coagulopathy or active bleeding disorders, e.g., INR >1.5 without anticoagulation therapy.
• Hematologic abnormalities: hematocrit <30%, hemoglobin <100 g/L, platelet count <100 × 10⁹/L, or WBC <4 × 10⁹/L or >10 × 10⁹/L.
• History of substance abuse, chronic alcoholism, or significant psychiatric illness impairing study compliance.
• Preoperative or intraoperative anatomical unsuitability of the valve apparatus or cardiac structure.
• Known allergy or hypersensitivity to polyurethane, polyester, or sulfonate-based biomaterials used in the valve prosthesis.
• Withdrawal from the study after valve implantation (such participants are not allowed to re-enroll).

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Нет

Дизайн исследования

Распределение

Нерандомизированное

Модель

Параллельные группы

Маскирование

Открытое

Основная цель

Лечение

Центры проведения

Китай · 1 центр

• Department of Cardiovascular Surgery, Zhongshan Hospital, Fudan University — Шанхай

Идентификаторы

NCT: NCT07097740 · PSVR-FIH-ZS

Первоисточники (государственные реестры)

• ClinicalTrials.gov (NIH, США)

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