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Evaluation of TAVR Using the NAVITOR Valve in a Global Investigation

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Evaluation of TAVR using the NAVITOR valve in a Global Investigation.

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Study details:

The VANTAGE clinical trial will evaluate the safety and effectiveness of the Navitor valve in patients with severe, symptomatic aortic stenosis who are at intermediate or low risk of surgical mortality. This trial will also evaluate the safety and effectiveness of the Navitor valve in a valve-in-valve application.

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Eligibility criteria

Researchers look for people who fit a certain description, called eligibility criteria. See if you qualify.

Inclusion criteria

Subject who is judged by a Heart Team, including a cardiac surgeon, to be appropriate for transcatheter heart valve intervention therapy, and is deemed to be at intermediate or low risk for open surgical aortic valve replacement (i.e., heart team estimates risk of surgical mortality < 7% at 30 days, considering the Society of Thoracic Surgeons (STS) risk score, overall clinical status, and other clinical co-morbidities unmeasured by the risk calculator).

New York Heart Association (NYHA) Functional Classification of II, III, or IV.

Degenerative aortic valve stenosis with echo-derived criteria, defined as: aortic valve area (AVA) of ≤ 1.0 cm2 (or indexed EOA ≤ 0.6 cm2/m2) AND either mean gradient ≥ 40 mmHg or peak jet velocity ≥ 4.0 m/s or doppler velocity index (DVI) ≤ 0.25. The echocardiogram supporting the qualifying AVA baseline measurement must be performed within 90 days prior to informed consent.

Aortic annulus diameter of 19-30 mm and ascending aorta diameter of 26-44 mm for the specified valve size listed in the IFU, as measured by CT (systolic phase) conducted within 12 months prior to informed consent.

Exclusion criteria

Life expectancy is less than 2 years in the opinion of the Investigator.

Evidence of an acute myocardial infarction [defined as ST-segment elevation myocardial infarction (STEMI) or non-ST-segment elevation myocardial infarction (NSTEMI) with acute ischemia symptoms and troponin elevation] within 30 days prior to index procedure.

Untreated clinically significant coronary artery disease requiring revascularization.

Any percutaneous coronary or peripheral interventional procedure performed within 30 days prior (except pacemaker or implantable cardioverter defibrillator (ICD) implant) to index procedure or planned within 30 days following the index procedure.

Blood dyscrasias as defined: leukopenia (WBC < 3000 mm3), acute anemia (Hb < 9 g/dL), thrombocytopenia (platelet count < 50,000 cells/mm³); history of bleeding diathesis or coagulopathy.

Active peptic ulcer or upper GI bleeding within 3 months prior to index procedure that would preclude anticoagulation.

Recent (within 6 months prior to index procedure date) cerebrovascular accident (CVA) or a transient ischemic attack (TIA).

Renal insufficiency (creatinine > 3.0 mg/dL or eGFR < 30 ml/min/1.73m2) and/ or end stage renal disease requiring chronic dialysis.

Hostile chest or conditions or complications from prior surgery that would make the subject be considered high surgical risk (i.e., mediastinitis, radiation damage, abnormal chest wall, porcelain aorta, adhesion of aorta or internal mammary artery to sternum, etc.).

Significant frailty as determined by the heart team (after objective assessment of frailty parameters) that would indicate high or extreme surgical risk.

Mixed aortic valve disease (aortic stenosis and aortic regurgitation with predominant aortic regurgitation 3-4+).

Aortic valve is a congenital unicuspid or congenital bicuspid valve as verified by echocardiography or CT.

Severe ventricular dysfunction with LVEF < 30% as measured by resting echocardiogram.

Pre-existing prosthetic heart valve or other implant (such as prosthetic ring or transcatheter edge-to-edge repair (TEER) clip) in any valve position. (Note: Subjects with a bioprosthetic aortic valve may be included in the ViV cohort.)

Severe circumferential mitral annular calcification (MAC) which is continuous with calcium in the left ventricular outflow tract (LVOT).

Severe (greater than or equal to 3+) mitral regurgitation or severe mitral stenosis with pulmonary compromise.

Minimum access vessel diameter of < 5.0 mm for small FlexNav Delivery System and < 5.5 mm for large FlexNav Delivery System.

Eccentricity ratio of the annulus < 0.73.

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Eligibility

Age eligible for study : 18 and older

Healthy volunteers accepted : No

Gender eligible for study: All

Things to know

Study dates

Study start: 2021-06-13

Primary completion: 2025-06-30

Study completion finish: 2036-02-28

Study type

TREATMENT

Phase

Trial ID

NCT04788888

Intervention or treatment

DEVICE: Navitor Transcatheter Aortic Valve and FlexNav Delivery System

Conditions

• Symptomatic Severe Aortic Stenosis

Image related to Symptomatic Severe Aortic Stenosis

Condition: Symptomatic Severe Aortic Stenosis
DEVICE: Navitor Transcatheter Aortic Valve and FlexNav Delivery System
Melbourne, Not Specified, Australia and more
Sponsor: Abbott Medical Devices

You may be eligible to participate in this trial based on your search. Check eligibility by answering some questions.

Are you running this trial? If you're a clinic or sponsor, you can claim this study. Claim or learn more.

Find a site

Closest Location:

The Alfred Hospital

Research sites nearby

Select from list below to view details:

The Alfred Hospital
Melbourne, Not Specified, Australia
St. Andrew's Hospital
Adelaide, Not Specified, Australia
Fiona Stanley Hospital
Murdoch, Not Specified, Australia
Macquirie University Hopsital
Ryde, Not Specified, Australia

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Participant Group/Arm	Intervention/Treatment
EXPERIMENTAL: Navitor Transcatheter Aortic Valve, FlexNav Delivery System Navitor Transcatheter Aortic Valve System Navitor valves (23mm, 25mm, 27mm, 29mm, and 35mm Titan valve), FlexNav Delivery system (small and large) and and Navitor Loading System (small, large, and LG+)	DEVICE: Navitor Transcatheter Aortic Valve and FlexNav Delivery System For traditional application, the Navitor valve is indicated for transcatheter delivery in patients with symptomatic severe native aortic stenosis who are intermediate or low surgical risk. For the valve-in-valve application, the Navitor valve is indicated for use in patients with symptomatic heart disease due to failure (stenosed, insufficient, or combined) of a surgical bioprosthetic aortic valve. Subjects will undergo transcatheter aortic valve replacement (TAVR) with the Navitor valve and FlexNav Delivery system

Participant Group/Arm

Intervention/Treatment

EXPERIMENTAL: Navitor Transcatheter Aortic Valve, FlexNav Delivery System

Navitor Transcatheter Aortic Valve System Navitor valves (23mm, 25mm, 27mm, 29mm, and 35mm Titan valve), FlexNav Delivery system (small and large) and and Navitor Loading System (small, large, and LG+)

DEVICE: Navitor Transcatheter Aortic Valve and FlexNav Delivery System

For traditional application, the Navitor valve is indicated for transcatheter delivery in patients with symptomatic severe native aortic stenosis who are intermediate or low surgical risk.
For the valve-in-valve application, the Navitor valve is indicated for use in patients with symptomatic heart disease due to failure (stenosed, insufficient, or combined) of a surgical bioprosthetic aortic valve.
Subjects will undergo transcatheter aortic valve replacement (TAVR) with the Navitor valve and FlexNav Delivery system

What is the study measuring?

Primary outcome

Primary Outcome Measure	Primary Outcome Description	Primary Outcome Time Frame
Incidence of a composite of all-cause mortality or fatal stroke/stroke with disability at 12 months (Primary Safety Endpoint)	A composite of all-cause mortality or fatal stroke/stroke with disability at 12 months post index Navitor implantation procedure per the Valve Academic Research Consortium (VARC) 3 event definitions	12 months post index procedure
The proportion of subjects who have moderate or greater paravalvular leak at 30 days (Primary Effectiveness Endpoint)	Moderate or greater paravalvular leak at 30 days	30 days post index procedure

Secondary outcome

Secondary Outcome Measure	Secondary Outcome Description	Secondary Outcome Time Frame
Transvalvular gradient	Mean change in mean transvalvular gradient between baseline and 12 months	12 months post index procedure
Effective orifice area	Mean change in effective orifice area between baseline and 12 months	12 months post index procedure
KCCQ quality of life score	Mean change in KCCQ quality of life score between baseline and 12 months	12 months post index procedure

Frequently Asked Questions

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References

Clinical Trials Gov: Evaluation of TAVR Using the NAVITOR Valve in a Global Investigation