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Enrolling by invitation NCT06854302

Angina After PCI: a Systems Medicine Study

— Observational Angina (Stable) Ischemic Heart Disease (IHD)

For patients and families

In plain language

An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.

What is being studied
The protocol lists: Cardiovascular magnetic resonance imaging, Coronary physiology.
Who it may be relevant to
Registry conditions: Angina (Stable), Ischemic Heart Disease (IHD). Basic parameters: from 18 years · All.
What needs checking
Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
Where it takes place
United Kingdom
Next step
Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →

Unsure about the terms? Read our patient guide →

Official title

Angina After PCI: a Systems Medicine Cohort Study

Overview

Angina may persist or recur in patients treated by coronary angioplasty. The angioplasty involves a balloon treatment to open a blocked heart blood vessel and usually a stent (thin metal tube) is placed. Stents do not always improve symptoms and may make symptoms worse. Sometimes a drug-eluting-balloon is used instead of a stent. This balloon coats the inside of the blood vessel to prevent re-narrowing. Research is needed to clarify the causes of ongoing angina and its impact on patients and the NHS, and to identify which patients will or will not benefit from a stent (hence avoiding over-treatment in the future). We plan a 5-year UK-wide multicenter study involving up to 600 patients with angina undergoing coronary angioplasty (with or without a stent). They will initially have a heart MRI scan. We will assess what might influence the recurrence of angina in the year after the angioplasty procedure. We will measure small blood vessel function in the heart and the amount of plaque persisting after PCI. Patients who report angina after coronary angioplasty usually have a second invasive angiogram. Instead, we will invite patients to have a heart MRI scan allowing us to also assess whether this scan might be more useful than a repeat angiogram in guiding clinical care. We will collaborate with life scientists, mathematicians, statisticians, and health economists to better understand causes and health economic implications of angina arising after coronary angioplasty procedures.

Detailed description

Background: Prior studies indicate that potentially one in three patients may experience angina within 12 months of undergoing percutaneous coronary intervention (PCI).

Hypothesis: 1) Diffuse coronary atherosclerosis and/or microvascular dysfunction impair myocardial blood flow (MBF) leading to angina post-PCI.

Design: A 5-year interdisciplinary program with 3 scientific work-packages (WPs): 1) Clinical, 2) Systems medicine, and 3) Health Economics.

WP1) Cohort study In 4 or more centers in the United Kingdom, 600 patients with angina will undergo stress/rest perfusion cardiovascular magnetic resonance (CMR) imaging with inline pixel-mapping of MBF (ml/min/g) and then coronary physiology measured during PCI. Patient reported outcome measures will be collected routinely during follow-up to 12 months.

Primary outcome: Adjudicated, residual angina (Seattle Angina Questionnaire Angina Frequency (SAQ-7-AF) score \<90).

Nested case-control study: stress perfusion CMR (MBF culprit artery territory, primary outcome) in approximately 200 patients reporting residual angina and 50 consecutive asymptomatic controls (all post-PCI). Clinically indicated coronary angiography including physiology tests (change from baseline measurement) and acetylcholine testing will be undertaken in approximately 120 patients.

WP2) Systems medicine (n=600) using biostatistics to identify multivariable baseline associates (clinical, coronary physiology, haemodynamics, circulating biomarkers (DNA, RNA, protein) of the SAQ-7-AF score (range 0 (Severe) - 100 (no angina)) post-PCI.

WP3) Health economics of NHS resource utilization and value of information (VoI) modelling to design stratified medicine trials.

Value: Identification of mechanisms to inform downstream diagnostic and therapeutic strategies for angina post-PCI.

Interventions

  • Diagnostic test Cardiovascular magnetic resonance imaging
    Observational diagnostic tests will include adenosine-stress perfusion cardiovascular magnetic resonance imaging before undergoing percutaneous coronary intervention.
  • Diagnostic test Coronary physiology
    Invasive coronary function tests using a diagnostic guidewire (PressureWire-X, Abbott), thermodilution, intravenous or intracoronary infusion of adenosine and intracoronary infusions of acetylcholine.

Primary outcome measures

  • Residual angina after percutaneous coronary intervention. [Time frame: From enrolment to 12 months]
Secondary outcome measures (12)
  • Angina [Time frame: From enrolment to 12 months]
  • Myocardial perfusion reserve [Time frame: From enrolment to 12 months]
  • Fractional flow reserve post-percutaneous coronary intervention [Time frame: 24 hours]
  • Coronary flow reserve after percutaneous coronary intervention [Time frame: 24 hours]
  • Index of microvascular resistance after percutaneous coronary intervention [Time frame: 24 hours]
  • Microvascular dysfunction after percutaneous coronary intervention [Time frame: 24 hours]
  • Health-related quality of life [Time frame: From enrolment to 12 months]
  • Physical function [Time frame: From enrolment to 12 months]
  • Illness perception [Time frame: From enrolment to 12 months]
  • Anxiety and depression [Time frame: From enrolment to 12 months]
  • Productivity loss [Time frame: From enrolment to 12 months]
  • Fraility [Time frame: From enrolment to 12 months]

Eligibility criteria

Inclusion criteria

BEFORE INVASIVE MANGEMENT

  • Angina by SAQ-7 Angina Frequency Score <90\*
  • Stress CMR imaging\*

DURING INVASIVE MANAGEMENT

  • PCI (successful)
  • Coronary physiology assessment post-PCI.

Exclusion criteria

  • Age <=18 years
  • Acute MI within 30 days
  • Invasive management >90 days after stress CMR
  • Inability to comply with the protocol
  • Lack of written informed consent.
  • Pregnancy.

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Observational model
Cohort

Study locations

United Kingdom · 4 centers
  • Royal Papworth Hospital NHS Foundation Trust — Cambridge
  • Golden Jubilee National Hospital — Clydebank
  • University Hospital Hairmyres — East Kilbride
  • Leeds General Infirmary — Leeds

Publications

  • Crea F, Bairey Merz CN, Beltrame JF, Berry C, Camici PG, Kaski JC, Ong P, Pepine CJ, Sechtem U, Shimokawa H. Mechanisms and diagnostic evaluation of persistent or recurrent angina following percutaneous coronary revascularization. Eur Heart J. 2019 Aug 1;40(29):2455-2462. doi: 10.1093/eurheartj/ehy857. PMID 30608528

Identifiers

NCT: NCT06854302 · 24/CARD/08

Primary sources (government registries)

View this study on ClinicalTrials.gov ↗