- ICH GCP
- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica NCT07613996
Impact of Hyperemic State on Angio-IMR Performance
The Impact of Hyperemic State on the Performance of Angiography Derived Indices in Assessing Coronary Microvascular Disease
The goal of this observational study is to evaluate the diagnostic performance of angiography-derived microcirculatory indices (Angio-IMR) in assessing patients with stable angina or suspected coronary artery disease. The main questions it aims to answer are:
How do the numerical values of Angio-IMR from five different software vendors change across three physiological states (resting, sub-hyperemia induced by nitroglycerin, and maximal hyperemia induced by adenosine)? Which physiological state and software algorithm provide the highest diagnostic accuracy (Area Under the Curve, AUC) for diagnosing Coronary Microvascular Disease (CMD) when compared to the gold standard wire-based IMR? Researchers will compare the Angio-IMR results calculated under the three different physiological conditions within the same patient to see how the hyperemic state impacts the performance and consistency of these non-invasive indices.
Participants will:
Undergo standard-of-care coronary angiography and physiological assessment using a pressure wire for index of microvascular resistance (Wire-IMR) as part of their clinical management.
Have their angiographic images captured at three specific time points: at rest, after intracoronary nitroglycerin, and during adenosine-induced maximal hyperemia.
Allow their de-identified imaging and clinical data to be analyzed by an independent core laboratory using five different Angio-IMR software platforms to evaluate microvascular function.
Panoramica dello studio
Stato
Intervento / Trattamento
Descrizione dettagliata
Study Overview and Procedural Protocol
This is a prospective, multi-center, diagnostic accuracy study employing a self-controlled design. All participants will undergo coronary angiography and physiological assessment according to standard clinical indications. During the procedure, specific angiographic images will be systematically captured for the target vessel at three distinct physiological time points:
Resting State: Baseline coronary angiography without any hyperemic agents. Sub-hyperemic State: Following the intracoronary administration of nitroglycerin.
Maximal Hyperemic State: During continuous intracoronary infusion of adenosine to achieve maximal microvascular vasodilation.
Immediately following image acquisition, the reference standard measurement-Wire-IMR-will be performed using a pressure-sensor-equipped guidewire under maximal hyperemia.
Core Laboratory Imaging Analysis and Blinding
All angiographic data will be de-identified and transferred to a centralized, independent Cardiovascular Imaging Core Laboratory at Zhongshan Hospital, Fudan University. The analysis will be conducted as follows:
Software Platforms: Five different commercially available Angio-IMR software platforms (anonymized as A, B, C, D, and E) will be used to calculate microvascular resistance.
Independent Analysis: Five dedicated analysts, each specialized in one specific software platform, will perform the calculations. Each analyst will be blinded to the patients' clinical information, the Wire-IMR gold standard results, and the results from the other four software platforms.
Standardization: A primary researcher, not involved in the software measurements, will pre-define the target vessel segments and measurement frames to ensure consistency across all five software platforms.
Statistical Considerations and Data Management The study aims to determine if the coronary hyperemic state significantly alters the fluid dynamics modeling utilized by Angio-IMR algorithms. AUC will be calculated for each software at each of the three states. A head-to-head comparison of AUCs will be performed using DeLong's test. To maintain data integrity, results from the core laboratory and the clinical centers will remain strictly separated until the final database lock.
Tipo di studio
Iscrizione (Stimato)
Contatti e Sedi
Contatto studio
- Nome: Jinying Zhou, MD, PhD
- Email: zhou.jinying@zs-hospital.sh.cn
Backup dei contatti dello studio
- Nome: Chenguang Li, MD, PhD
- Numero di telefono: 021 6404 1990
- Email: li.chenguang@zs-hospital.sh.cn
Luoghi di studio
-
-
-
Guangzhou, Cina
- Reclutamento
- The First Affiliated Hospital, Sun Yat-sen University
-
Contatto:
- Xun Hu, MD, PhD
- Numero di telefono: 020-87608185
- Email: hxun@mail.sysu.edu.cn
-
-
Please Select
-
Shanghai, Please Select, Cina, 200000
- Reclutamento
- Zhongshan Hospital, Fudan University
-
Contatto:
- Jinying Zhou, MD, PhD
- Numero di telefono: 021 6404 1990
- Email: zhou.jinying@zs-hospital.sh.cn
-
-
Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
- Adulto
- Adulto più anziano
Accetta volontari sani
Metodo di campionamento
Popolazione di studio
The study population consists of adult patients (aged 18 and older) clinically diagnosed with stable angina or suspected coronary artery disease who are scheduled to undergo conventional coronary angiography and invasive physiological assessment.
Participants are prospectively and consecutively recruited from multiple clinical centers in China. The population specifically targets individuals with non-obstructive coronary arteries (stenosis < 50%) or those with moderate stenosis (50%-90%) but preserved epicardial flow (FFR > 0.80), where assessment of coronary microvascular function is clinically indicated to investigate the cause of ischemia.
Descrizione
Inclusion Criteria:
- Stable angina or suspected coronary heart disease.
- Scheduled for coronary angiography and physiological assessment.
- Target vessel with stenosis < 50% or 50%-90% with fractional flow reserve (FFR) > 0.80.
- Provided informed consent.
Exclusion Criteria:
- Hemodynamic instability (acute myocardial infarction, cardiogenic shock, severe arrhythmia).
- Contraindications to angiography (e.g., end-stage renal disease).
- Contraindications to adenosine (e.g., severe asthma, high-degree atrial-ventricular block).
- Life expectancy < 1 year or pregnancy.
- Target vessel unsuitable for wire operation (left main lesion, severe tortuosity) or stenosis > 90%.
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
Coorti e interventi
Gruppo / Coorte |
Intervento / Trattamento |
|---|---|
|
Single cohort, self-controlled
|
Unlike the reference standard "Wire-IMR," which requires the advancement of a specialized pressure-sensor guidewire into the distal coronary artery, Angio-IMR is a wire-free technology.
It derives microvascular resistance indices purely through computational fluid dynamics (CFD) or specialized mathematical models based on standard coronary angiographic projections.
This eliminates the risk of wire-induced vascular injury or spasm.
|
Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
Area Under the ROC Curve (AUC)
Lasso di tempo: Baseline
|
Comparison of AUC for 5 types of Angio-IMR against Wire-IMR (Gold standard, CMD defined as Wire-IMR ≥ 25) under three states.
|
Baseline
|
Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
Diagnostic Accuracy
Lasso di tempo: Baseline
|
Sensitivity, specificity, positive predictive value, negative predictive value.
|
Baseline
|
|
Correlation
Lasso di tempo: Baseline
|
Pearson/Spearman coefficients between Angio-IMR and Wire-IMR.
|
Baseline
|
|
Agreement
Lasso di tempo: Baseline
|
Bland-Altman analysis (Bias and Limits of Agreement).
|
Baseline
|
|
Inter-vendor Agreement
Lasso di tempo: Baseline
|
Consistency between different software brands.
|
Baseline
|
Collaboratori e investigatori
Studiare le date dei record
Studia le date principali
Inizio studio (Effettivo)
Completamento primario (Stimato)
Completamento dello studio (Stimato)
Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Effettivo)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
- B2026-265
Piano per i dati dei singoli partecipanti (IPD)
Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?
Informazioni su farmaci e dispositivi, documenti di studio
Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti
Studia un dispositivo regolamentato dalla FDA degli Stati Uniti
Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .
Prove cliniche su Disfunsione dell'arteria coronaria
-
I.R.C.C.S Ospedale Galeazzi-Sant'AmbrogioReclutamentoCoronary Artery DiseaseItalia
-
Tel-Aviv Sourasky Medical CenterCompletatoSoggetti consecutivi che sono idonei per una coronaria | Angioplastica di de Novo Lesion(s) in Native Coronary | Le arterie dovrebbero essere sottoposte a screening per l'idoneità. | Un numero totale di 200 pazienti che soddisfano la selezione | Criteri e disponibilità a firmare il consenso... e altre condizioniIsraele
Prove cliniche su Angiography-derived IMR
-
Cardurion Pharmaceuticals, Inc.Imara, Inc.RitiratoInsufficienza cardiaca con frazione di eiezione conservata
-
University Hospital, AkershusTerminatoDisordine bipolare | Psicosi | Altre diagnosi e condizioniNorvegia
-
Consorzio Futuro in RicercaCompletatoAngina pectoris refrattariaItalia
-
University of WashingtonCompletatoSchizofrenia | Disordine bipolare | Grave malattia mentale
-
Imara, Inc.Attivo, non reclutanteAnemia falciformeStati Uniti, Regno Unito
-
Cardurion Pharmaceuticals, Inc.Imara, Inc.Terminatoβ TalassemiaIsraele, Francia, Malaysia, Tacchino, Danimarca, Georgia, Grecia, Italia, Libano, Marocco, Olanda, Tunisia, Regno Unito
-
Cardurion Pharmaceuticals, Inc.Imara, Inc.TerminatoAnemia falciformeStati Uniti, Oman, Italia, Regno Unito, Libano, Grecia, Marocco, Tunisia, Ghana, Kenya, Olanda, Senegal, Uganda
-
Cardurion Pharmaceuticals, Inc.Imara, Inc.CompletatoAnemia falciformeStati Uniti, Regno Unito
-
University Hospital, AkershusHelse Sor-Ost; RomeriksprosjektetCompletatoDisordini mentali | Disturbi dell'umore | Schizofrenia | Disordine bipolare | Disturbi affettivi, psicoticiNorvegia
-
Second Affiliated Hospital, School of Medicine,...RenJi Hospital; Shengjing HospitalCompletatoInfarto miocardico acuto (AMI)Cina