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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT05804903
Other study ID # NVT06EMP2
Secondary ID
Status Recruiting
Phase N/A
First received
Last updated
Start date November 24, 2023
Est. completion date December 31, 2029

Study information

Verified date February 2024
Source NVT GmbH
Contact Calvin Bahr
Phone +41 78 251 8084
Email c.bahr@biosensors.com
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

The EMPIRE II study evaluates the safety and performance of the entire ALLEGRA THV System. The primary safety endpoint is composite of all-cause mortality or stroke rates at 12 months. And the primary performance endpoint is device success at 7 days. Based on the outcomes of a study with a similar device and considering a drop-out rate of 5%, 177 patients need to be enrolled in the study.


Recruitment information / eligibility

Status Recruiting
Enrollment 177
Est. completion date December 31, 2029
Est. primary completion date March 1, 2025
Accepts healthy volunteers No
Gender All
Age group 18 Years and older
Eligibility Inclusion Criteria: 1. Symptomatic severe calcific stenosis of a native aortic valve with an AVA =1.0 cm2 (or AVA index =0.6 cm2/m2), AND mean aortic pressure gradient = 40mmHg OR maximal transaortic velocity =4.0m/s OR Doppler velocity index =0.25 on site-reported echocardiography OR symptomatic patients with degeneration of a surgical bioprosthetic valve (stenosis +/- insufficiency) on site-reported echocardiography 2. Local multi-disciplinary Heart Team and Central Screening Committee (CSC) agree on indication and eligibility for TAVI 3. Age =18 years 4. Patient has signed the Patient Informed Consent Form 5. Patient is willing and able to comply with requirements of the study, including all follow-up visits Exclusion Criteria: Patient will not be included if ANY one of the following conditions exists: General: 1. Mean aortic annulus diameter as measured by pre-procedural CT or internal diameter of the bioprosthesis is <16.5 mm or >27 mm 2. Echocardiographic evidence of intracardiac thrombus or vegetation (site-reported) 3. Significant disease of the aorta that would preclude safe advancement of the ALLEGRA Plus THV System 4. Severe ilio-femoral vessel disease that would preclude safe placement of an 18 Fr introducer sheath or make endovascular access impossible 5. Porcelain aorta 6. Severe left ventricular dysfunction with ejection fraction (EF) <20% (site-reported) 7. Evidence of active endocarditis or other acute infections 8. Renal failure requiring continuous renal replacement therapy 9. Untreated clinically significant coronary artery disease requiring revascularization 10. Any percutaneous interventional procedure (e.g. PCI with stenting) within 14 days prior of the index procedure 11. Acute MI =30 days prior to the index procedure 12. Symptomatic carotid or vertebral artery disease requiring intervention or carotid/vertebral intervention within the preceding 45 days 13. Cerebrovascular accident (CVA) or transient ischemic attack (TIA) =6 months or prior CVA with moderate or severe disability (e.g. modified Rankin scale score >2) 14. History of bleeding diathesis or coagulopathy; acute blood dyscrasias as defined: thrombocytopenia (platelets <80,000/µl), acute anemia (hemoglobin <10 g/dl), leukopenia (WBC <3000/ µl) 15. Active peptic ulcer or gastrointestinal (GI) bleeding =3 months 16. Severe (greater than 3+) mitral insufficiency (site-reported) 17. Uncontrolled atrial fibrillation 18. Required emergency surgery for any reason 19. Known hypersensitivity to contrast media, which cannot be adequately pre-medicated or contraindication to anticoagulant or anti-platelet medication or to nitinol alloy or to bovine tissue 20. Life expectancy =12 months due to other medical illness 21. Currently participating in another investigational drug or device study 22. Hypertrophic obstructive cardiomyopathy 23. Pregnancy or intend to become pregnant during study participation Specific exclusions in patients with native aortic valve disease (site-reported): 24. Unicuspid or bicuspid aortic valve 25. Non-calcified aortic stenosis 26. Identified risk of coronary occlusion due to Sinus of Valsalva anatomy and/or bulky calcified aortic valve leaflets in close proximity to coronary ostia Specific exclusions in patients with degenerated surgical bioprosthetic aortic valves (valve-in-valve) (site-reported): 27. High risk of coronary occlusion 28. Partially detached leaflets that may obstruct a coronary ostium

Study Design


Related Conditions & MeSH terms


Intervention

Device:
(ALLEGRA Plus Transcatheter Heart Valve) TAVI in severe calcified aortic stenosis or in failed surgical aortic bioprosthesis
Implantation of the ALLEGRA Plus Transcatheter Heart Valve in severe calcified aortic stenosis or in failed surgical aortic bioprosthesis

Locations

Country Name City State
Finland Oulu University Hospital Oulu
Germany Deutsches Herzzentrum Berlin Berlin
Poland Klinika Kardiochirurgii Gdansk
Poland III Katedra Kardiologii Katowice
Spain Reina Sofia Hospital Córdoba
Spain Hospital La Paz Madrid
Switzerland Herzzentrum - Luzerner Kantonsspital Luzern

Sponsors (1)

Lead Sponsor Collaborator
NVT GmbH

Countries where clinical trial is conducted

Finland,  Germany,  Poland,  Spain,  Switzerland, 

Outcome

Type Measure Description Time frame Safety issue
Primary Composite of all-cause mortality or stroke rates 12 months
Secondary All-cause mortality rate 7 days, 30 days, 6 months, 12 months, 2 years, 3 years , 4 years, 5 years
Secondary Cardiovascular mortality rate 7 days, 30 days, 6 months, 12 months, 2 years, 3 years , 4 years, 5 years
Secondary Any stroke rate 7 days, 30 days, 6 months, 12 months, 2 years, 3 years , 4 years, 5 years
Secondary Transient ischemic attack rate 7 days, 30 days, 6 months, 12 months, 2 years, 3 years , 4 years, 5 years
Secondary Device success rate Device success at 30 days (In-hospital may be used if 30-day data are not available):
Technical success
Freedom from mortality
Freedom from surgery or intervention related to the device (excluding permanent pacemaker) or to a major vascular or access-related or cardiac structural complication
Intended performance of the valve‡(mean gradient<20 mmHg, peakvelocity<3 m/s, Doppler velocity index =0.25, and less than moderate aortic regurgitation
30 days
Secondary Effective orifice area (EOA) as assessed by transthoracic echocardiogram (TTE) as determined by an independent Echo Core Lab 7 days, 30 days, 6 months, 12 months, 2 years, 3 years , 4 years, 5 years
Secondary Transvalvular mean and peak pressure gradient as assessed by transthoracic echocardiogram (TTE) as determined by an independent Echo Core Lab 7 days, 30 days, 6 months, 12 months, 2 years, 3 years , 4 years, 5 years
Secondary Transvalvular mean and peak pressure gradient as assessed by transthoracic as determined by an independent Echo Core Lab 7 days, 30 days, 6 months, 12 months, 2 years, 3 years , 4 years, 5 years
Secondary NYHA classification 7 days, 30 days, 6 months, 12 months, 2 years, 3 years , 4 years, 5 years
Secondary Life-threatening/major bleeding (BARC 3b or more) 7 days, 30 days, 6 months, 12 months, 2 years, 3 years , 4 years, 5 years
Secondary Major vascular complications according to VARC-3 7 days, 30 days, 6 months, 12 months, 2 years, 3 years , 4 years, 5 years
Secondary Early safety profile according to VARC-3 30 days
Secondary Quality of life as assessed using the Kansas City Cardiomyopathy Questionnaire (KCCQ-12) Assessed with the Kansas City Cardiomyopathy Questionnaire (KCCQ-12). Patients are asked questions about physical limitation, symptom frequency, quality of life, and social limitation. Responses are given on a Likert scale that for each individual item is scored on a scale of 0-100 with higher scores indicating better health. 7 days, 30 days, 6 months, 12 months, 2 years, 3 years , 4 years, 5 years
Secondary New pacemaker implantation rate 7 days, 30 days, 6 months, 12 months, 2 years, 3 years , 4 years, 5 years
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