Stent Geometry in Sutureless Bioprosthetic Valves

November 26, 2018 updated by: Magnus Dalén, Karolinska University Hospital

Leaflet Thickening and Stent Geometry in Sutureless Bioprosthetic Aortic Valves

A single-center prospective interventional trial. Patients implanted with a sutureless bioprosthetic aortic valve at Karolinska University Hospital in Stockholm, Sweden from 2012 will be eligible. 4-dimensional volume-rendered computed tomography (CT) of the heart will be performed. The aim of the CT is to assess valve geometry and hypo-atrenuated leaflet thickening. Results of the CT examination, preoperative clinical characteristics, and postoperative clinical data will be registered. Data will be collected prospectively and retrospectively. Informed consent will be obtained from patients meeting the inclusion criteria before the initiation of any study-specific procedures.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

47

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Sweden
      • Stockholm, Sweden
        • Karolinska University Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Implanted with a sutureless Perceval (LivaNova) sutureless bioprosthetic aortic valve at Karolinska University Hospital in Stockholm, Sweden between 2012 and 2016
  • Provide written informed consent

Exclusion Criteria:

•Contraindication for CT with intravenous contrast injection

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?

Design Details

  • Primary Purpose: Diagnostic
  • Allocation: N/A
  • Interventional Model: Single Group Assignment

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Other: Cardiac CT imaging
Radiation: 4-dimensional volume-rendered computed tomography

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Regional expansion of valve prosthesis
Time Frame: At CT performed once no less than 30 days and up to 10 years after aortic valve replacement
Regional expansion measured using the angle formed by the border of each prosthetic leaflet and the centre point of the valve
At CT performed once no less than 30 days and up to 10 years after aortic valve replacement
Overall expansion of valve prosthesis
Time Frame: At CT performed once no less than 30 days and up to 10 years after aortic valve replacement
Overall expansion of the implanted prosthesis calculated as the ratio between the ex vivo cross-sectional area and the in vitro cross-sectional area of the implanted valve
At CT performed once no less than 30 days and up to 10 years after aortic valve replacement

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Eccentricity of valve prosthesis
Time Frame: At CT performed once no less than 30 days and up to 10 years after aortic valve replacement
Eccentricity of the implanted prosthesis calculated as ([max diameter-min diameter]/max diameter)×100
At CT performed once no less than 30 days and up to 10 years after aortic valve replacement

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Karolinska University Hospital

Collaborators

Karolinska Institutet

Investigators

  • Principal Investigator: Magnus Dalén, MD PhD, Karolinska Institutet

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 1, 2016

Primary Completion (Actual)

November 1, 2018

Study Completion (Actual)

November 1, 2018

Study Registration Dates

First Submitted

November 22, 2018

First Submitted That Met QC Criteria

November 22, 2018

First Posted (Actual)

November 26, 2018

Study Record Updates

Last Update Posted (Actual)

November 28, 2018

Last Update Submitted That Met QC Criteria

November 26, 2018

Last Verified

November 1, 2018

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • Perceval Geometry

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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