STAR Trial (Siegel Transcatheter Aortic Valve Replacement in Patients With Symptomatic Severe Aortic Stenosis)

NCT ID: NCT07278310

Last Updated: 2025-12-17

Basic Information

• Recruitment Status: NOT_YET_RECRUITING
• Clinical Phase: NA
• Total Enrollment: 1025 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2026-01-31
• Study Completion Date: 2027-07-31

Brief Summary

To evaluate the safety and efficacy of Siegel™ TAVR System in the treatment of subjects with symptomatic severe native aortic stenosis.

Detailed Description

The primary objective is to assess the acute and long-term safety and efficacy of the Siegel THV device in adult subjects with symptomatic, severe native calcific aortic stenosis eligible for the transcatheter aortic valve replacement.

Conditions

Symptomatic Severe Native Aortic Stenosis; Aortic Stenosis

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: SINGLE

Study Groups

Treatment Arm

Investigational Device- Siegel TAVR

Group Type: EXPERIMENTAL

Siegel TAVR Device

Intervention Type: DEVICE

Siegel TAVR Device

Control Arm

Commercially available TAVR device- Sapien TAVR or Evolute TAVR

Group Type: ACTIVE_COMPARATOR

TAVR Device

Intervention Type: DEVICE

Commercially available TAVR Device

Interventions

TAVR Device

Commercially available TAVR Device

Intervention Type: DEVICE

Siegel TAVR Device

Siegel TAVR Device

Intervention Type: DEVICE

Eligibility Criteria

Inclusion Criteria

Subjects are eligible for entry in this study if ALL the following conditions are met:

1. Age ≥ 18 years

2. Symptomatic, severe native calcific aortic stenosis in subjects at low, intermediate or high surgical risk AVA ≤ 1.0 cm2 or AVA index ≤ 0.6 cm2/m2 or Jet velocity ≥ 4.0 m/s or mean gradient ≥ 40 mmHg or dimensionless Index <0.25

3. New York Heart Association Functional Class ≥ 2

4. Requires aortic valve replacement and is indicated for TAVR as determined by the Heart Team (composed of an experienced interventional cardiologist and an experienced cardiac surgeon)

5. Eligible for transfemoral delivery of a TAVR

6. Native aortic annulus suitable for safe placement of Siegel 23mm, transcatheter heart valve. Preprocedural measurements by TTE and CT of aortic annulus area (330- 440 mm2 )

7. Understands the study requirements and the treatment procedures and provides written informed consent

8. Subject agrees to complete all required scheduled follow-up visits.

Exclusion Criteria

Subjects will be excluded for entry in this study if ANY of the following conditions are met:

Anatomical

1. Cardiac anatomy precluding safe placement of a transcatheter aortic valve.

2. Iliofemoral anatomy (vessel diameter < 5.5mm) precluding safe placement of commercially available transcatheter aortic valves (SAPIEN 3 or Evolut).

3. Pre-existing prosthetic heart valve or ring except in the mitral position.

4. Unicuspid aortic valve

5. Severe aortic regurgitation (>3+)

6. Severe mitral or severe tricuspid regurgitation(>3+) requiring intervention.

7. Moderate to severe mitral stenosis.

8. Hypertrophic obstructive cardiomyopathy (HOCM)

9. Echocardiographic evidence of intracardiac mass, thrombus or vegetation requiring treatment.

10. Significant aortic disease including abdominal aortic or thoracic aneurysm defined as maximal luminal diameter 5.5 cm or greater or ascending aortic aneurysm defined as maximal luminal diameter 5 cm or greater.

Clinical

11. Evidence of an acute myocardial infarction ≤ 30 days before enrollment.

12. Any percutaneous coronary or peripheral interventional procedure performed within 30 days prior to the index procedure

13. Blood dyscrasias as defined: leukopenia (WBC < 3000 cell/mL, anemia (Hgb < 9 g/dL), thrombocytopenia (platelet count < 50,000 cells/mL), history of bleeding diathesis or coagulopathy.

14. Untreated clinically significant Coronary Artery Disease (CAD) requiring revascularization

15. Cardiogenic shock manifested by low cardiac output, vasopressor dependence, or mechanical hemodynamic support within the past 30 days.

16. Hemodynamic or respiratory instability requiring inotropic support, mechanical ventilation or mechanical heart assistance within 30 days of enrollment

17. Need for emergency surgery for any reason

18. Ventricular dysfunction with left ventricular ejection fraction (LVEF) < 25% as measured by resting echocardiogram

19. Recent (within 6 months) cerebrovascular accident (CVA) or transient ischemic attack (TIA).

20. Symptomatic carotid or vertebral artery disease or successful treatment of carotid stenosis within 30 days of enrollment

21. Renal insufficiency (eGFR < 30 ml/min per the Cockcroft-Gault formula) and/or renal replacement therapy, or end stage renal disease requiring chronic dialysis

22. GI bleeding within the past 3 months

23. Severe lung disease (FEV1 < 50% predicted) or currently on home oxygen

24. History of cirrhosis or any active liver disease

25. Significant abdominal or thoracic aortic disease (such as porcelain aorta, abdominal aortic aneurysm > 5.0 cm, severe calcification, aortic coarctation, etc.) that would preclude safe passage of the delivery system

26. Severe pulmonary hypertension (e.g., PA systolic pressure ≥ 2/3 systemic pressure)

27. A known hypersensitivity or contraindication to any of the following which cannot be adequately pre-medicated: aspirin, heparin, ticlopidine and clopidogrel, contrast media, nickel, cobalt ,chromium, titanium, molybdenum, rhenium, polyethylene materials.

28. Ongoing sepsis, including active endocarditis

29. BMI > 50 kg/m2

30. Subject refuses a blood transfusion

31. Life expectancy < 12 months due to associated non-cardiac co-morbid conditions

32. Other medical, social, or psychological conditions that in the opinion of an Investigator precludes the subject from appropriate consent

33. Severe dementia (resulting in either inability to provide informed consent for the trial/procedure, prevents independent lifestyle outside of a chronic care facility, or will fundamentally complicate rehabilitation from the procedure or compliance with follow-up visits)

34. Currently participating in an investigational drug or another investigational device trial

35. Subject is contraindicated for cardiac CT

36. Subject belongs to a vulnerable population (Vulnerable subject populations are defined as individuals with mental disability, persons in nursing homes, children, impoverished persons, homeless persons, nomads, refugees, and those permanently incapable of giving informed consent. Vulnerable populations also may include members of a group with a hierarchical structure such as university students, subordinate hospital and laboratory personnel, employees of the Sponsor, members of the armed forces, and persons kept in detention).

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

MiRus

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Other Identifiers

MR-002

Identifier Type: -

Identifier Source: org_study_id