All Women Comparing Self-expanding ALLEGRA Valve to Any Other Balloon-expandable Valve

Not Applicable

Not yet recruiting

• Conditions: Aortic Stenosis, Severe
• Interventions: Device: ALLEGRA TAVI System TF; Device: Ballon-expandable valve system

• Registration Number: NCT05989074
• Lead Sponsor: Ceric Sàrl

Brief Summary

Study is aimed to demonstrate that the self-expandable Allegra TAVI system provides lower mean gradient assessed by TTE compared to balloon-expandable valve systems in a female patient population with symptomatic severe aortic stenosis

Detailed Description

Study is aimed to demonstrate that the self-expandable Allegra transcatheter aortic valve implantation (TAVI) system provides lower mean gradient assessed by Transthoracic Echo (TTE) at 30 days post procedure, compared to balloon-expandable valve systems in a female patient population with symptomatic severe aortic stenosis.

Patients in both arm will receive anticoagulants according to routine practice of the hospital.

Patients will be followed-up until 1 year after the procedure.

Study Timeline

• Study First Submitted: 2023-07-25
• Status Verified: 2023-08
• Study First Submitted QC: 2023-08-02
• Study First Posted: 2023-08-14
• Last Update Submitted: 2024-01-11
• Last Update Posted: 2024-01-12
• Study Start: 2024-02-01
• Primary Completion: 2025-08-31
• Study Completion: 2025-08-31

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: Female
• Target Recruitment: 130

Inclusion Criteria

1. Female sex
2. Age ≥ 75 years (according to ESC/EACTS, Guidelines for the management of valvular heart disease)
3. Severe calcific aortic valve stenosis defined as follows: high-gradient aortic stenosis (mean pressure gradient across aortic valve > 40 mmHg or peak velocity > 4.0 m/s) Symptomatic aortic valve stenosis with New York Heart Association (NYHA) Class ≥II
4. ECG-gated Multi-Slice Computed Tomographic (MSCT) measurements determined an aortic annulus perimeter-derived average diameter >19 mm and <27.4 mm or area-derived diameter >18 and <28 mm
5. Anatomy suitable for trans-femoral TAVI for both devices used in the study, including a minimum femoral diameter of 6 mm.
6. Subject with a documented local Heart Team (HT) indication for TF TAVI
7. Life expectancy longer than 1 year.
8. Willingness to undergo clinical and echocardiographic follow-up after the procedure.
9. Subject can understand the purpose of the clinical investigation, has signed voluntarily the informed consent form and is agreeing to the scheduled follow-up requirements

Exclusion Criteria

1. Male sex
2. Non-calcific acquired aortic stenosis
3. Native unicuspid/bicuspid aortic valve or congenital aortic abnormality
4. Previous implantation of heart valve in any position
5. Severe aortic regurgitation (> 3+)
6. Severe mitral regurgitation (> 3+)
7. Severe tricuspid regurgitation (> 3+)
8. Severe left ventricular dysfunction (Left Ventricular Ejection Fraction (LVEF) < 30%)
9. Echocardiographic evidence of intracardiac mass, thrombus or vegetation
10. Untreated cardiac conduction disease in need of pacemaker implantation
11. Evidence of acute Myocardial Infarction (MI) less than 30 days before signing informed consent
12. Any need for emergency surgery
13. Any active bleeding that precludes anticoagulation
14. Liver failure (Child-C)
15. End-stage renal disease requiring chronic dialysis or creatinine clearance < 30cc/min
16. Pulmonary hypertension (systolic pressure > 80mmHg)
17. A known hypersensitivity or contraindication to all anticoagulation/antiplatelet regimens (or inability to be anticoagulated for the index procedure), to cobalt chromium, to bovine and/or collagen, glutaraldehyde or contrast media
18. Any medical, social or psychological condition that in the opinion of the investigator precludes the subject from giving appropriate consent or adherence to the required follow-up procedures
19. Currently participating in another drug or device trial (excluding observational registries) for which the primary endpoint has not been assessed
20. Subject under judicial protection, tutorship or curatorship (for France only)

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
ALLEGRA	ALLEGRA TAVI System TF	ALLEGRA Delivery System TF will be administered.Patient will receive Anticoagulation medication according to the site-specific standard of care
Balloon-expandable TAVI	Ballon-expandable valve system	Patient will receive any kind of CE-marked balloon-expandable valve, and anticoagulation medication according to the site-specific standard of care

Primary Outcome Measures

Name	Time	Method
Trans-aortic mean gradient measured by TTE 30 days after the TAVI procedure.	At 30 Days	Trans-aortic mean gradient measured by TTE 30 days after the TAVI procedure.

Secondary Outcome Measures

Name	Time	Method
Early safety assessed by composite criteria	At 30 days	* Freedom from all-cause mortality; * Freedom from all stroke; * Freedom from Valve Academic Research Consortium (VARC) type 2-4 bleeding (in trials where control group is surgery, it is appropriate to include only Type 3 and 4 bleeding); * Freedom from major vascular, access-related, or cardiac structural complication; * Freedom from acute kidney injury stage 3 or 4; * Freedom from moderate or severe aortic regurgitation; * Freedom from new permanent pacemaker due to procedure-related conduction abnormalities; * Freedom from surgery or intervention related to the device
Technical success assessed by composite criteria	Up to the end of the time when patient exit the procedure room	* Freedom from mortality; * Successful access, delivery of the device, and retrieval of the delivery system; * Correct positioning of a single prosthetic heart valve into the proper anatomical location; * Freedom from surgery or intervention related to the device or to a major vascular or access-related, or cardiac structural complication
Device success assessed by composite criteria	At 30 days	Technical success; * Freedom from mortality; * Freedom from surgery or intervention related to the device or to a major vascular or access-related or cardiac structural complication; * Intended performance of the valve‡ (mean gradient \<20 mmHg, peak velocity \<3 m/s, Doppler velocity index ≥ 0.25, and less than moderate aortic regurgitation)
Clinical efficacy assessed by composite criteria	At 1 year	* Freedom from all-cause mortality; * Freedom from all stroke; * Freedom from hospitalization for procedure- or valve-related causes; * Freedom from Kansas City Cardiomyopathy Questionnaire (KCCQ) Overall Summary Score \<45 or decline from baseline of \>10 point (i.e. Unfavourable Outcome)