- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT02437734
Virtual Coronary Physiology: an Angiogram is All You Need
Disease in coronary arteries kills more people in the UK than any other cause. The investigators have developed a computer system ('VIRTU') which predicts blood pressure changes inside coronary arteries. This is important because;
- Doctors make better decisions regarding when and how to treat patients with coronary artery disease if they have these blood pressure measurements
- Currently, Doctors have to insert a metal wire inside the heart to measure artery pressures which is time-consuming and requires special equipment, staff, training and medicines.
Although this invasive technique saves lives and money, more than 95% of patients do not receive the procedure or the benefits it provides.
VIRTU provides a solution to this problem since it only needs X-ray pictures and does not require any wires, drugs, or additional time, equipment or staff. VIRTU has been tested and works but needs improving before it can be used in all patients.
GOALS:
Following, and compared with, our pilot project ((Modelling the significance of coronary artery disease, STH 15740) to:
- Improve VIRTU's accuracy.
- Improve VIRTU's speed.
- Test VIRTU in patients with more complicated coronary disease.
One hundred patients will be recruited from angiography waiting lists and consented before attending for their angiography. The patients will be asked whether their angiogram pictures and pressure measurements maybe used as part of the data collection for this study. The data will be used to validate and develop VIRTU to make it 'patient-ready'. VIRTU will deliver all the advantages of the current invasive technique (i.e. reduced deaths, heart attacks and cost) but, is less invasive and usable in 100% patients.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
Plan of Investigation Several interacting workstreams will proceed in parallel in this observational, analytical, 36-month study between the University of Sheffield (UoS), Sheffield Teaching Hospitals NHS Foundation Trust (STH), and our collaborators at King's College London (KCL).
This protocol document outlines the methodology for clinical data collection from patients attending STH. These (fully anonymised) clinical data will then be used to validate and optimise the use of VIRTU by improving its accuracy and speed as well as developing a user-friendly interface. The development work will take place within the UoS and KCL, with no impact on NHS patient, staff or premises after the clinical data collection described below (these subsequent workstreams are detailed in Appendix 1).
- Study design A phase II, observational, analytical study of coronary angiography and computational fluid dynamics in 100 adults with coronary artery disease undergoing coronary angiography.
Methodology (Workstream 1) Clinical data will be collected from the Cardiac Catheter Laboratory (CCL) at STH in a similar manner to which was performed in a pilot project. Therefore, the feasibility of recruitment targets and modelling techniques to be used in this study have already been demonstrated. In this current study, 100 patients with stable CAD of any pattern/severity, potentially suitable for PCI, will be recruited.
Potential participants will be identified by a member of the care team from pre-admission clinic lists in the cardiac catheter laboratory at the time of diagnostic angiography or referral from another Cardiologist. These patients will be sent a patient information sheet. If they are interested in finding out more about the study, the patients will meet with the Research Nurse or Doctor to discuss the project in more detail and ask questions. At the pre-admission clinic the Research Nurse or Doctor will take informed consent from those patients willing to participate and complete the study recruitment log and the Clinical Details section of the Data Collection Form.
The patients will then attend for their scheduled PCI at the Northern General Hospital at a later date (usually 2 -3 weeks after the pre-admission clinic). Details of the clinical procedure are below. During the PCI a member of the research team (Dr Gunn, Dr Morton, Dr Morris or Research Nurse) will record the arterial diagrams and procedure details on the second part of the anonymised Data Collection Form.
Clinical Procedure Selected patients will be asked to undergo cardiac magnetic resonance imaging before and after PCI, using a standardised protocol. All clinical and angiographic techniques are in routine NHS clinical practice. No experimental techniques will be used. Pre- and post procedure care will not alter from routine elective PCI care.
The PCI will proceed as normal where indicated, using best contemporary practice, including premedication. The study methods are in routine use for many patients undergoing PCI; and include rotational coronary angiography and pressure wire deployment to assess the physiological significance of lesions. This study merely requires that they be used systematically using standardised methodology.
Rotational coronary angiography will be recorded in standard single axis rotations (cranial and caudal for left coronary; plane PA for right coronary). An intravenous bolus of 200mcg GTN will be given prior to each run. They will be done on a breath hold, with a rapid hand injection of 10-20mL of contrast. Also, standard, single plane, orthogonal, carefully selected, angiograms will be recorded to guide the procedure. These will be performed at baseline and after stent deployment.
All major epicardial diseased vessels will be interrogated with a pressure wire (Volcano Corporation). An infusion of adenosine (140mcg/kg/min) will be set up and attached to the intravenous cannula in the hand/arm. The pressure wire will be calibrated against the guide catheter pressure, with the introducing needle removed. The wire will then be advanced across the lesion(s). A bolus of 200mcg GTN will be given and then the iv adenosine infusion started (repeated as necessary since adenosine has very short half life). When the pressures have stabilised, the baseline pressure and flow velocity will be recorded as the wire is withdrawn, while imaging, at 1cm/sec.
Stent implantation will proceed according to the clinical judgment of the operator, using both the angiographic appearance and the pressure gradient (Fractional Flow Reserve) across any lesions of interest as arbiters. Standard criteria will be used; namely a stenosis that appears to be >50% diameter stenosis in 2 orthogonal projections by eye (or >70% in one) and/or an FFR <0.80. The choice of stent will be at the discretion of the operator.
After stent deployment, the rotational angiograms and pressure wire pullback will be repeated, using the methods described above. In the case of multi-vessel disease, the pullback will be repeated for the 2nd and the 3rd vessels.
- Setting for the project Clinical data collection will happen over a 30 month period within Sheffield Teaching Hospitals NHS Foundation Trust, Northern General Hospital. Cardiac Catheter Laboratory will be used for all procedures, because it possesses single axis rotational angiography.
- Patient population One hundred patients will be recruited from PCI waiting lists.
Type d'étude
Inscription (Réel)
Phase
- N'est pas applicable
Contacts et emplacements
Lieux d'étude
-
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South Yorkshire
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Sheffield, South Yorkshire, Royaume-Uni, S5 7AU
- Northern General Hospital
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-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
- Enfant
- Adulte
- Adulte plus âgé
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- Stable symptoms of coronary ischemia
- Coronary angiographic findings of significant or borderline coronary lesions of any morphology
- Potentially suitable for PCI
Exclusion Criteria:
- Critical ischemia
- Significant valvular heart disease
- Bleeding diathesis
- Terminal cancer
- Pregnancy 6. Lack of informed consent
- Chronic total occlusion of target vessel
- Acute presentation in the previous 60 days
- Intolerance of adenosine, nitrate, iodine based contrast media
- Inability to take dual antiplatelet therapy
- Target vein graft.
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Diagnostique
- Répartition: N / A
- Modèle interventionnel: Affectation à un seul groupe
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
---|---|
Autre: Coronary angiography
Selected patients will be asked to undergo Coronary angiography with cardiac magnetic resonance imaging before and after Percutaneous Coronary Intervention.
Clinical data collection will happen over a 30 month period.
|
A phase II, observational, analytical study of coronary angiography and computational fluid dynamics in 100 adults with coronary artery disease undergoing coronary angiography.
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Délai |
---|---|
Intracoronary blood pressures
Délai: 2 hours
|
2 hours
|
Collaborateurs et enquêteurs
Collaborateurs
Les enquêteurs
- Chaise d'étude: Nana Theodorou, STH
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- STH16467
Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .
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