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[Physiologic evaluation of coronary circulation. Role of invasive and non invasive techniques]
Jaume Candell-Riera1, Josep Martín-Comín, Javier Escaned
1Hospital Universitari Vall d'Hebron, Barcelona, Spain.
Insights
Coronary artery disease evaluation is shifting from anatomical coronary angiography to physiological methods. Pressure guidewires, Doppler, and imaging techniques offer better functional assessment of coronary circulation.
Area of Science:
- Cardiology
- Medical Imaging
- Physiology
Background:
- Coronary artery disease (CAD) evaluation traditionally relies on anatomical assessment via coronary angiography.
- Coronary angiography has limitations including methodological constraints and significant interobserver variability.
- There is a need for more precise and functional methods to assess CAD severity and extent.
Purpose of the Study:
- To discuss the clinical value of advanced techniques for evaluating coronary artery disease.
- To compare anatomical versus physiological assessment of coronary circulation.
- To highlight complementary roles of various diagnostic modalities in patient management.
Main Methods:
- Physiological assessment using pressure guidewires and intracoronary Doppler for coronary flow quantification.
- Semi-quantitative myocardial perfusion imaging (single-proton emission computed tomography) and echocardiography.
- Stress testing and pharmacological challenge tests combined with imaging modalities.
Main Results:
- Pressure guidewires and intracoronary Doppler provide precise physiological evaluation of coronary circulation.
- Myocardial perfusion imaging and echocardiography offer valuable functional insights, complementing anatomical data.
- These techniques enhance the functional evaluation of patients with coronary artery disease.
Conclusions:
- Functional assessment of coronary artery disease is crucial for accurate patient management.
- Advanced physiological and imaging techniques offer significant advantages over purely anatomical assessments.
- A combination of techniques provides a comprehensive approach to evaluating coronary artery disease.
Abstract:
For many years, the evaluation of the extent and severity of coronary artery disease has been mainly anatomical, carried out by coronary angiography. However, this technique has methodological limitations and interobserver variability is considerable. Quantification of coronary reserve with pressure guidewires and intracoronary Doppler now provides more precise physiologic evaluation of coronary circulation. Myocardial perfusion single proton emission computed tomography and echocardiography, combined with stress and/or pharmacological challenge testing, though they are only semiquantitative techniques, also offer appropriate complements to coronary angiography in the functional evaluation of coronary patients. The aim of this paper is to discuss the clinical value of these techniques.