Visualisation of disease progression in human coronary arteries and the relationship with biomechanical forces

ISRCTN ISRCTN43170100
DOI https://doi.org/10.1186/ISRCTN43170100
Secondary identifying numbers METC-2015-535
Submission date
24/06/2020
Registration date
07/07/2020
Last edited
07/08/2020
Recruitment status
No longer recruiting
Overall study status
Completed
Condition category
Circulatory System
Prospectively registered
Protocol
Statistical analysis plan
Results
Individual participant data
Record updated in last year

Plain English summary of protocol

Background and study aims
A myocardial infarction (MI), also known as a heart attack, occurs when blood flow decreases or stops to a part of the heart, causing damage to the heart muscle. Atherosclerosis is a disease in which plaque builds up inside the arteries. Arteries are blood vessels that carry oxygen-rich blood to the heart and other parts of the body. Plaque is made up of fat, cholesterol, calcium, and other substances found in the blood. Over time, plaque hardens and narrows the arteries. Acute coronary syndrome is a term used to describe a range of conditions associated with sudden, reduced blood flow to the heart.
The aim of this study is to investigate the association between shear stress and plaque growth and plaque composition changes over time in patients with acute coronary syndrome. Furthermore, the local stress inside the plaque will be calculated to investigate possible rupture risk.

Who can participate?
Patients with acute coronary syndrome that are eligible for percutaneous coronary interventions and who contain arteries that are accessible with imaging catheters. Patients will need to give their informed consent.

What does the study involve?
The study involves additional imaging of another non-treated, less severe diseased coronary artery during the percutaneous coronary intervention initiated for treatment of the most diseased coronary artery. After 1 year, imaging of the non-treated coronary artery is repeated during another percutaneous coronary intervention. During these interventions blood will be collected. Furthermore, one month after the initial procedure a computed tomography coronary angiogram is acquired. Besides, regular clinical check-ups are performed.

What are the possible benefits and risks of participating?
Intravascular coronary imaging is often part of the clinical routine in percutaneous coronary intervention as it can help the operator to achieve an optimal stent result. The burden of this study to the patient at baseline and follow-up is the additional imaging of non-treated coronary, which adds extra time to the total procedural time and a very small risk of coronary complications associated with introduction of a guide wire and imaging catheter in the coronary artery (less than 1 promille). The patient might potentially benefit from the invasive imaging in two ways. First, invasive imaging might help to reach optimal treatment of the most diseased region of the coronary artery and at follow up the treatment location will be investigated for restenosis, and if necessary re-treated. Secondly, thorough evaluation of the less severe diseased vessel might reveal additional, significant, but angiographically silent lesions warranting treatment. Recently the failure rate of angiography to visualize such additional lesions causing clinical events in the near future, has been

Where is the study run from?
The study will be run at the Thoraxcenter of the ErasmusMC Rotterdam, the Netherlands

When is the study starting and how long is it expected to run for?
August 2015 to April 2019

Who is funding the study?
The study is in part funded by the European Research Council

Who is the main contact?
Dr. ir. JJ Wentzel, j.wentzel@erasmusmc.nl

Contact information

Dr Jolanda Wentzel
Scientific

Erasmus University Medical Center
Molewaterplein 50
Rotterdam
3000 CA
Netherlands

ORCiD logoORCID ID 0000-0001-9893-3404
Phone +31 10 7044044
Email j.wentzel@erasmusmc.nl

Study information

Study designSingle-center prospective observational longitudinal- study
Primary study designObservational
Secondary study designLongitudinal study
Study setting(s)Hospital
Study typeDiagnostic
Participant information sheet Not available in web format, please use the contact details below to request a patient information sheet
Scientific titleImaging and Modeling to investigate the mutual relationship of plaque growth and biomechanical parameters in human coronary arteries
Study acronymIMPACT
Study objectivesThe objective of this study is to investigate the association between biomechanical parameters (e.g. shear stress) and plaque geometry and composition and plaque changes over time. This study has a large potential in finding new parameters that give novel insights in plaques that might cause a myocardial infarction. Thereby this study might contribute to the identification of patients at risk of cardiovascular events in the future.
Ethics approval(s)Approved 05/11/2015, Medisch Ethische Toetsings Commissie of the ErasmusMC (Molewaterplein 50, Rotterdam, the Netherlands; no telephone number provided; metc@erasmusmc.nl), ref: METC-2015-535 Positief Besluit NL54519.078.15, v02
Health condition(s) or problem(s) studiedAcute coronary syndrome
InterventionThis study is an observational study on atherosclerotic plaque progression in human coronary arteries. The aim of this study is to investigate the influence of biomechanical factors on plaque progression over time. The intravascular imaging of the coronary arteries that is performed at baseline and after one year follow up will be used to delineate the local atherosclerotic plaque thickness. By also analyzing the local plaque thickness at one year follow up the local plaque progression will be measured. Furthermore, biomechanical parameters will be calculated using finite element modelling using 3D reconstructions of the coronary arteries based on information from intravascular imaging and computed tomography. Moreover, plaque phenotype will be identified and used in further analysis.

Methodology:
Acute coronary syndrome patients treated for coronary artery disease at the catheterization laboratory are enrolled in this study. After treatment of the most diseased coronary artery (indication for the percutaneous coronary intervention), another less severe diseased coronary artery is imaged using multiple imaging modalities and this imaging procedure is repeated at the catheterization laboratory after one year. Furthermore at one month after the first imaging moment, the patient will undergo a CT coronary angiography procedure. Blood is collected during the baseline and follow up imaging procedure.
Intervention typeOther
Primary outcome measure1. Shear stress measured using computational fluid dynamics in 3D reconstructions of the coronary arteries based on the imaging at baseline and categorized as low, mid or high at baseline and 1 year
2. Plaque geometry and composition (including wall thickness, cap thickness and lipids) measured at several locations in the coronary arteries using images acquired and compared for regions exposed to low, mid and high shear stress at baseline and 1 year
Secondary outcome measuresStress inside the wall will be calculated using finite element modelling based on the images acquired at baseline and 1 year follow up
Overall study start date05/08/2015
Completion date17/04/2019

Eligibility

Participant type(s)Patient
Age groupAdult
SexBoth
Target number of participants70
Total final enrolment56
Key inclusion criteria1. Patient eligible for PCI of a native coronary artery
2. Written informed consent obtained
3. Study coronary artery must be accessible to the OCT /NIRS-IVUS catheters
Key exclusion criteria1. Unable to provide informed consent
2. Under 18 years of age
3. Hemodynamic instability
4. Cardiogenic shock
5. TIMI 0 flow at target lesion site
6. Lesion beyond acute bends or in a location within the coronary anatomy where the catheter cannot transverse
7. Bypass graft as target vessel
8. Ejection fraction less than 30%
9. Contra-indication to emergency coronary artery bypass surgery
10. No access to cardiac surgery
11. Contra-indication to treatment with aspirin, ticlopidine, clopidogrel, prasugrel, ticagrelor, or heparin
12. Renal insufficiency (creatinine clearing < 50ml/min)
13. Pregnancy or inadequate anticonception
14. History of bleeding diathesis or coagulopathy.
15. History of stroke within the past year
16. History of significant gastrointestinal bleed within the past month
Date of first enrolment03/03/2016
Date of final enrolment30/03/2018

Locations

Countries of recruitment

  • Netherlands

Study participating centre

Erasmus University Medical Center
Molewaterplein 50
Rotterdam
3000 CA
Netherlands

Sponsor information

Erasmus University Medical Center
University/education

Molewaterplein 50
Rotterdam
3000 CA
Netherlands

Phone +31 10 7033938
Email f.zijlstra.1@erasmusmc.nl
Website http://www.erasmusmc.nl/
ROR logo "ROR" https://ror.org/018906e22

Funders

Funder type

Research council

European Research Council
Government organisation / National government
Alternative name(s)
ERC

Results and Publications

Intention to publish date01/08/2020
Individual participant data (IPD) Intention to shareYes
IPD sharing plan summaryOther
Publication and dissemination planThe outcome of the study will be published in scientific journals.
IPD sharing planAll data generated or analysed during this study will be included in the subsequent results publication.

Study outputs

Output type Details Date created Date added Peer reviewed? Patient-facing?
Protocol file version v2.0 08/11/2016 07/08/2020 No No

Additional files

ISRCTN43170100_Protocol_v2.0_08Nov2016.pdf
uploaded 07/08/2020

Editorial Notes

07/08/2020: Uploaded protocol (not peer reviewed) Version 2.0 08 November 2016.
07/07/2020: Trial’s existence confirmed by Erasmus MC.