Multi Center Registry of Transcatheter Aortic Valve Replacement in Northeast China

Not Applicable

Not yet recruiting

• Conditions: Severe Aortic Valve Stenosis
• Interventions: Other: All aortic valve products on the market

• Registration Number: NCT04988243
• Lead Sponsor: CCRF Inc., Beijing, China

Brief Summary

The purpose of this study was to observe the safety and effectiveness of transcatheter aortic valve replacement in patients with aortic valve stenosis in a real-world clinical practice environment.

Detailed Description

This study is a prospective / retrospective, multicenterstudy after listing. The researchers preliminarily confirmed that they could be enrolled in this study according to the diagnosis of the subjects' medical history. After fully informed, they signed the informed consent, and met the TAVR inclusion requirements (see the inclusion criteria for details). At the same time, they registered the subjects in multiple centers. After the start of the trial, the participants were enrolled in the study, All the subjects who met the inclusion criteria but did not meet the discharge criteria were registered in the central registration system. The patients were followed up for 30 days, 6 months and 12 months, and followed up by telephone for 2, 3, 4 and 5 years.

Study Timeline

• Study First Submitted: 2021-07-23
• Status Verified: 2021-08
• Study Start: 2021-08
• Primary Completion: 2021-08
• Study First Submitted QC: 2021-08-01
• Last Update Submitted: 2021-08-01
• Study First Posted: 2021-08-03
• Last Update Posted: 2021-08-03
• Study Completion: 2028-08

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 320

Inclusion Criteria

1. Severe aortic valve stenosis, defined as follows:

   1. Symptomatic patients:

      • The mean differential pressure measured by echocardiography ≥ 40mm Hg
      • Or peak aortic ejection ≥ 4.0 m / S
      • Or aortic valve area ≤ 1.0cm ²（ Or AVA index ≤ 0.6 cm2 / m2)

   2. Asymptomatic patients:

      • Severe aortic stenosis and aortic valve area ≤ 1.0cm ²（ 6 cm2 / m2) with aortic ejection peak value ≥ 5.0 M / s or mean pressure difference measured by --echocardiography ≥ 60 mm Hg;
      • Or aortic valve area ≤ 1.0cm ²（ Or AVA index ≤ 0.6 cm2 / m2), combined with aortic ejection peak ≥ 4.0 m / s or average differential pressure measured by echocardiography ≥ 40 mm Hg, combined with limited exercise tolerance test, abnormal blood pressure response or arrhythmia;
      • Or aortic valve area ≤ 1.0cm ²（ Or AVA index ≤ 0.6 cm2 / m2), combined with aortic ejection peak ≥ 4.0 m / s or average differential pressure measured by echocardiography ≥ 40 mm Hg, combined with LVEF < 50%

2. Subjects who plan (or have) to use the transcatheter aortic valve replacement system for percutaneous aortic valve replacement

3. The patients agreed to join the study, voluntarily signed the informed consent and completed the follow-up;

4. Be able to contact the subjects or their legal guardians / relatives;

5. The medical record records the subjects who have died and can't get any contact information of the subjects（ (for dead cases only)

Note: for dead subjects, they must meet 1, 2 and 5 at the same time before they can be included in the group.

Exclusion Criteria

1. Contraindications to any artificial biological valve implantation;

2. Any known allergies or contraindications;

   • Aspirin or heparin and bivalirudin;
   • Tigrelol and clopidogrel;
   • Nickel titanium alloy;
   • Contrast medium;

3. The patient is currently participating in drug or device research;

4. The patient is pregnant or lactating;

5. Aortic annulus diameter < 17 mm or > 32 mm;

6. The diameter of approach vessel was less than 5.0mm;

7. The investigator believes that the patient is not suitable to participate in this study or complete the follow-up specified in the protocol;

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SEQUENTIAL

Arm && Interventions

Group	Intervention	Description
Prospective and retrospective study of subjects undergoing aortic valve surgery	All aortic valve products on the market	This study is a prospective / retrospective, multicenter, and observational study after listing. The researchers can initially determine that they can be enrolled in the study according to the history diagnosis of the subjects. After fully informed, they sign informed consent form. After the evaluation of the researchers, they meet the TAVR selection requirements, and register the subjects in multiple centers at the same time

Primary Outcome Measures

Name	Time	Method
Primary end point: the incidence of all-cause death 12 months after operation	12 months after aortic valve replacement	After subjects completed aortic valve replacement surgery, whether prospectively or retrospectively, all-cause mortality at 12 months after operation was collected according to the time node of subjects' enrollment

Secondary Outcome Measures

Name	Time	Method
The compound incidence of death, surgery, severe stroke, life-threatening bleeding, serious vascular complications and acute renal failure (within 30 days after operation);	Within 30 days after aortic valve replacement	The compound incidence of death, surgery, severe stroke, life-threatening bleeding, serious vascular complications and acute renal failure (within 30 days after operation);
The implantation rate of permanent pacemaker within 30 days;	Within 30 days after aortic valve replacement	The implantation rate of permanent pacemaker within 30 days;
All stroke (disabled or not disabled) within 12 months and 2, 3, 4 and 5 years	12 months and within 2, 3, 4 and 5 years	All stroke (disabled or not disabled) within 12 months and 2, 3, 4 and 5 years;
the incidence of life-threatening bleeding within 12 months and 2, 3, 4 and 5 years;	12 months and within 2, 3, 4 and 5 years	the incidence of life-threatening bleeding within 12 months and 2, 3, 4 and 5 years;
The incidence of reoperation due to dysfunction of prosthetic valve within 12 months and 2,3,4,5 years;	12 months and within 2, 3, 4 and 5 years	The incidence of reoperation due to dysfunction of prosthetic valve within 12 months and 2,3,4,5 years;
The incidence of readmission due to symptoms and signs of aortic valve disease within 12 months and 2,3,4,5 years;	12 months and within 2, 3, 4 and 5 years	The incidence of readmission due to symptoms and signs of aortic valve disease within 12 months and 2,3,4,5 years;
The incidence of prosthetic valve dysfunction at 12 months (moderate or severe stenosis or reflux by ultrasonography);	12 months and within 2, 3, 4 and 5 years	The incidence of prosthetic valve dysfunction at 12 months (moderate or severe stenosis or reflux by ultrasonography);
The incidence of thrombus in clinical and subclinical prosthetic heart valves at 12 months;	12 months after aortic valve replacement	The incidence of thrombus in clinical and subclinical prosthetic heart valves at 12 months;