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Updated: Feb 23, 2026

Interventional Diagnostic Procedure: A Practical Guide for the Assessment of Coronary Vascular Function
Published on: March 15, 2022
Invasive assessment of coronary artery disease
Stylianos A Pyxaras1, William Wijns2, Johan H C Reiber3
1Cardiology Department, Coburg-Clinic, Ketschendorfer Str. 33, 96450, Coburg, Germany. steliospyxaras@gmail.com.
Insights
Accurate diagnosis of coronary artery disease during heart catheterization is crucial. Integrating anatomical and functional data improves prognostic stratification and guides treatment for better patient outcomes.
Area of Science:
- Cardiology
- Medical Imaging
- Interventional Cardiology
Background:
- Coronary artery disease (CAD) presents significant mortality and morbidity.
- Accurate diagnostic assessment during heart catheterization is vital for prognosis and treatment.
- Intravascular imaging modalities complement coronary angiography for precise atherosclerotic burden quantification.
Purpose of the Study:
- To review the current state-of-the-art invasive diagnostic methods used in heart catheterization.
- To highlight the role of integrating anatomical and functional information in diagnosing coronary artery disease.
Main Methods:
- Review of current invasive diagnostic techniques in heart catheterization.
- Discussion of intravascular imaging modalities: intravascular ultrasound (IVUS) and optical coherence tomography (OCT).
- Explanation of hemodynamic assessment using fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR).
Main Results:
- Intravascular imaging allows precise quantification of atherosclerotic burden.
- FFR and iFR serve as coronary flow surrogates to assess stenosis relevance.
- Integration of anatomical and functional data offers a comprehensive approach.
Conclusions:
- Invasive diagnostic methods during heart catheterization are essential for managing coronary artery disease.
- Combining anatomical imaging with functional flow assessment enhances diagnostic accuracy.
- Future strategies may leverage integrated data for improved percutaneous coronary intervention guidance.
Abstract:
Coronary artery disease is associated to high mortality and morbidity rates and an accurate diagnostic assessment during heart catheterization has a fundamental role in prognostic stratification and treatment choices. Coronary angiography has been integrated by intravascular imaging modalities, namely intravascular ultrasound and optical coherence tomography, which allow the precise quantification of the atherosclerotic burden of coronary arteries. The hemodynamic relevance of a given coronary stenosis can be assessed using stress or resting indexes: fractional flow reserve and instantaneous wave-free ratio are both coronary flow surrogates, used to guide percutaneous coronary interventions. This review summarizes the current state-of-the-art of invasive diagnostic methods during heart catheterization and highlights the potential role that an integration of anatomical and functional information enables.
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