Siegel Transcatheter Aortic Valve Replacement In Patients With Symptomatic Severe Aortic Stenosis

Overview

About this study

The purpose of this study is to evaluate the safety and efficacy of Siegel™ TAVR System in the treatment of subjects with symptomatic severe native aortic stenosis.

Participation eligibility

Participant eligibility includes age, gender, type and stage of disease, and previous treatments or health concerns. Guidelines differ from study to study, and identify who can or cannot participate. There is no guarantee that every individual who qualifies and wants to participate in a trial will be enrolled. Contact the study team to discuss study eligibility and potential participation.

Inclusion Criteria:

  • Age ≥ 18 years.

  • 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

  • New York Heart Association Functional Class ≥ 2.

  • 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)

  • Eligible for transfemoral delivery of a TAVR.

  • 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 )

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

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

Exclusion Criteria:

Anatomical

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

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

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

  • Unicuspid aortic valve.

  • Severe aortic regurgitation (>3+)

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

  • Moderate to severe mitral stenosis.

  • Hypertrophic obstructive cardiomyopathy (HOCM)

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

  • 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

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

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

  • 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.

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

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

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

  • Need for emergency surgery for any reason.

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

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

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

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

  • GI bleeding within the past 3 months.

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

  • History of cirrhosis or any active liver disease.

  • 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.

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

  • 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.

  • Ongoing sepsis, including active endocarditis.

  • BMI > 50 kg/m2.

  • Subject refuses a blood transfusion.

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

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

  • 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)

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

  • Subject is contraindicated for cardiac CT.

  • 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).

Note: Other protocol defined Inclusion/Exclusion Criteria may apply.

Eligibility last updated 12/3/2025. Questions regarding updates should be directed to the study team contact.

Participating Mayo Clinic locations

Study statuses change often. Please contact the study team for the most up-to-date information regarding possible participation.

Mayo Clinic Location Status Contact

Jacksonville, Fla.

Mayo Clinic principal investigator

Abdallah El Sabbagh, M.D.

Contact us for the latest status

Rochester, Minn.

Mayo Clinic principal investigator

Kimberly Holst, M.D.

Contact us for the latest status

Contact information:

Structural Heart Disease Research Coordinators

(507) 255-6133

More information

Publications

Publications are currently not available
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CLS-20600178

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