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Updated: Jan 4, 2026

Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
Published on: March 15, 2022
1-Year Outcomes of Angina Management Guided by Invasive Coronary Function Testing (CorMicA)
Thomas J Ford1, Bethany Stanley2, Novalia Sidik3
1West of Scotland Heart and Lung Centre, Golden Jubilee National Hospital, Clydebank, United Kingdom; British Heart Foundation Glasgow Cardiovascular Research Centre, Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, United Kingdom; Gosford Hospital, NSW Health, Gosford, Australia.
Invasive coronary function testing improved angina symptoms and quality of life for patients without obstructive coronary artery disease. This stratified medical therapy approach showed sustained benefits at one year.
Area of Science:
- Cardiology
- Vascular Medicine
- Diagnostic Procedures
Background:
- Angina management in patients without obstructive coronary artery disease (CAD) is challenging.
- Invasive coronary function testing (ICFT) offers potential for personalized medical therapy.
- Long-term outcomes of ICFT-guided management in this population remain under investigation.
Purpose of the Study:
- To evaluate the effectiveness of ICFT in stratifying management for angina patients without obstructive CAD.
- To assess the impact of ICFT-guided therapy on patient-reported outcomes and clinical events.
Main Methods:
- 151 patients with angina and ischemia but no obstructive CAD were randomized.
- Intervention group received stratified medical therapy guided by ICFT.
- Control group received standard care with blinded ICFT results.
- Primary endpoints included 1-year Seattle Angina Questionnaire and EQ-5D scores, and major adverse cardiac events.
Main Results:
- The intervention group showed a significant improvement in overall angina symptoms (27% increase in SAQ score) at 1 year (p<0.001).
- Quality of life (EQ-5D index) significantly improved in the intervention group compared to controls (mean difference 0.11 units, p=0.010).
- Major adverse cardiac events were similar between groups after a median 19-month follow-up (12% vs 11%, p=0.803).
Conclusions:
- Stratified medical therapy guided by ICFT significantly improves angina symptoms and quality of life in patients with ischemia and no obstructive CAD.
- These benefits are sustained at one year post-procedure.
- ICFT facilitates effective management strategies for this patient cohort.
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