Treating Severe Mitral Valve Annular or Valvular Calcification Using Shockwave Balloon SMARTWAVE

NCT ID: NCT06952374

Last Updated: 2025-04-30

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

10 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-03-08

Study Completion Date

2027-03-31

Brief Summary

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Mitral stenosis (MS) is a heavily symptomatic valvular heart disease. Common causes of MS included chronic rheumatic heart disease (CRHD) and mitral annular calcification (MAC). Current guideline recommends percutaneous balloon mitral valvuloplasty (PBMV) being the first line intervention for rheumatic MS with favorable anatomy. However, severely calcified mitral valve (i.e. those with Wilkins scores\>8) makes the mitral valve non-pliable and carries high risk of severe mitral regurgitation (MR) (4-19%) with conventional balloon valvuloplasty. MAC is an increasingly recognized disease associated with atherosclerotic risk factors, and a well-recognized valve morphology that responses poorly with PBMV. Besides, conventional open-heart surgery for MAC-associated mitral valve dysfunction carries high mortality. Transcatheter mitral valve replacement with valve-in-MAC has become an alternative in treating these patients. However, valve-in-MAC is not always feasible and still carries operative and 30-day mortality.

Intravascular lithotripsy is an approved adjunct interventional therapy in treating calcified lesions to facilitate stenotic lesion opening in peripheral vascular disease and coronary artery disease. The off-label use of current peripheral lithotripsy balloon in mitral valve as a compassionate treatment or as an adjunct treatment before mitral balloon valvuloplasty and transcatheter mitral valve replacement has been reported with success . A possible mechanism is that lithotripsy preferentially impacts hard tissue, disrupts calcium, and leaves soft tissue undisturbed, improving valve pliability, preventing leaflet damage, and making subsequent valvuloplasty safer. However, the off-label use of multiple peripheral lithotripsy balloons in mitral valve is technically complicated.

SmartWave balloon was specifically designed lithotripsy balloon for calcified aortic stenosis. This first-in-human study aims to apply the SmartWave lithotripsy balloon in treating calcified mitral stenosis due to MAC or severely calcified rheumatic mitral valve.

Detailed Description

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Mitral stenosis (MS) is a heavily symptomatic valvular heart disease. Common causes of MS included chronic rheumatic heart disease (CRHD) and mitral annular calcification (MAC). Current guideline recommends percutaneous balloon mitral valvuloplasty (PBMV) being the first line intervention for rheumatic MS with favorable anatomy. However, severely calcified mitral valve (i.e. those with Wilkins scores\>8) makes the mitral valve non-pliable and carries high risk of severe mitral regurgitation (MR) (4-19%) with conventional balloon valvuloplasty. MAC is an increasingly recognized disease associated with atherosclerotic risk factors, and a well-recognized valve morphology that responses poorly with PBMV. Besides, conventional open-heart surgery for MAC-associated mitral valve dysfunction carries high mortality. Transcatheter mitral valve replacement with valve-in-MAC has become an alternative in treating these patients. However, valve-in-MAC is not always feasible and still carries operative and 30-day mortality.

Intravascular lithotripsy is an approved adjunct interventional therapy in treating calcified lesions to facilitate stenotic lesion opening in peripheral vascular disease and coronary artery disease. The off-label use of current peripheral lithotripsy balloon in mitral valve as a compassionate treatment or as an adjunct treatment before mitral balloon valvuloplasty and transcatheter mitral valve replacement has been reported with success . A possible mechanism is that lithotripsy preferentially impacts hard tissue, disrupts calcium, and leaves soft tissue undisturbed, improving valve pliability, preventing leaflet damage, and making subsequent valvuloplasty safer. However, the off-label use of multiple peripheral lithotripsy balloons in mitral valve is technically complicated.

SmartWave balloon was specifically designed lithotripsy balloon for calcified aortic stenosis. This first-in-human study aims to apply the SmartWave lithotripsy balloon in treating calcified mitral stenosis due to MAC or severely calcified rheumatic mitral valve.

Conditions

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Mitral Annulus Calcification Rheumatic Heart Disease

Keywords

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Mitral valve stenosis

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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SmartWave

Group Type EXPERIMENTAL

SmartWave Lithotripsy balloon

Intervention Type DEVICE

ntravascular lithotripsy is an approved adjunct interventional therapy in treating calcified lesions to facilitate stenotic lesion opening in peripheral vascular disease and coronary artery disease. The off-label use of current peripheral lithotripsy balloon in mitral valve as a compassionate treatment or as an adjunct treatment before mitral balloon valvuloplasty and transcatheter mitral valve replacement has been reported with success . A possible mechanism is that lithotripsy preferentially impacts hard tissue, disrupts calcium, and leaves soft tissue undisturbed, improving valve pliability, preventing leaflet damage, and making subsequent valvuloplasty safer.

Interventions

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SmartWave Lithotripsy balloon

ntravascular lithotripsy is an approved adjunct interventional therapy in treating calcified lesions to facilitate stenotic lesion opening in peripheral vascular disease and coronary artery disease. The off-label use of current peripheral lithotripsy balloon in mitral valve as a compassionate treatment or as an adjunct treatment before mitral balloon valvuloplasty and transcatheter mitral valve replacement has been reported with success . A possible mechanism is that lithotripsy preferentially impacts hard tissue, disrupts calcium, and leaves soft tissue undisturbed, improving valve pliability, preventing leaflet damage, and making subsequent valvuloplasty safer.

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

* Age \>18 and
* Able to give procedure and study consent and
* Severe symptomatic mitral stenosis (MVA \<1.5cm\^2 derived by 3D planimetry or continuity equation or pressure half time) and
* Presence of mitral annular calcification or
* CRHD with severe leaflet calcification with Wilkins score \>8

Exclusion Criteria

* Baseline \> moderate MR
* Intracardiac thrombus as visualized by TEE
* Pregnant patients. Female patients of childbearing potential must have a negative pregnancy test (per site standard test) within 7 days prior to index procedure.
* Active infection with bacteremia
* Current participation in another investigational drug or device study
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Peijia Medical Technology (Suzhou) Co., Ltd.

INDUSTRY

Sponsor Role collaborator

Prince of Wales Hospital, Shatin, Hong Kong

OTHER

Sponsor Role lead

Responsible Party

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Dr So Chak Yu kent

Clinical assistant professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Kent So, MbChB

Role: PRINCIPAL_INVESTIGATOR

Chinese University of Hong Kong

Locations

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Prince of Wales Hospital

Shatin, New Territories, Hong Kong

Site Status RECRUITING

Countries

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Hong Kong

Central Contacts

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Daniel Xu, Nursing Officer

Role: CONTACT

Phone: 85235051518

Email: [email protected]

Facility Contacts

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Kent So, MBChB

Role: primary

Daniel Xu, Nursing officer

Role: backup

References

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Reference Type BACKGROUND
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Writing Committee Members; Otto CM, Nishimura RA, Bonow RO, Carabello BA, Erwin JP 3rd, Gentile F, Jneid H, Krieger EV, Mack M, McLeod C, O'Gara PT, Rigolin VH, Sundt TM 3rd, Thompson A, Toly C. 2020 ACC/AHA Guideline for the Management of Patients With Valvular Heart Disease: A Report of the American College of Cardiology/American Heart Association Joint Committee on Clinical Practice Guidelines. J Am Coll Cardiol. 2021 Feb 2;77(4):e25-e197. doi: 10.1016/j.jacc.2020.11.018. Epub 2020 Dec 17. No abstract available.

Reference Type BACKGROUND
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Other Identifiers

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2024.362

Identifier Type: -

Identifier Source: org_study_id