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[Imaging methods in diagnosis of coronary heart disease]
1Abteilung für Kardiologie, Universität Wien.
Insights
Coronary angiography visualizes blockages but doesn't assess heart muscle blood flow. New noninvasive methods are needed to evaluate coronary artery stenosis severity and myocardial ischemia for better patient outcomes.
Area of Science:
- Cardiovascular Medicine
- Medical Imaging
- Physiology
Background:
- Coronary heart disease is a leading global cause of mortality.
- Coronary angiography visualizes stenosis but cannot assess myocardial microcirculation.
- Angiographic stenosis severity doesn't always correlate with myocardial ischemia extent.
Purpose of the Study:
- To highlight limitations of coronary angiography in assessing myocardial ischemia.
- To advocate for noninvasive techniques for physiological assessment of coronary stenoses.
- To explore the future clinical value of integrated cardiovascular assessment methods.
Main Methods:
- Review of current diagnostic limitations in coronary artery disease.
- Discussion of the need for noninvasive physiological assessment.
- Exploration of combined morphological, functional, and perfusion evaluation.
Main Results:
- Coronary angiography is insufficient for evaluating microcirculatory changes.
- Discrepancies exist between angiographic findings and actual myocardial ischemia.
- Noninvasive methods offer potential for comprehensive assessment.
Conclusions:
- Reliance solely on coronary angiography for stenosis severity is inadequate.
- Noninvasive physiological assessment is crucial for accurate ischemia evaluation.
- Future cardiovascular diagnostics require integrating morphology, function, and perfusion data.
Abstract:
Coronary heart disease is the leading cause of death and disability worldwide. Coronary angiography makes it possible to visualize coronary artery stenosis and can be used for angioplasty and stent implantation; however, it does not allow the assessment of changes in myocardial microcirculation. The severity of an angiographically evaluated coronary stenosis does not always correspond to the extent of myocardial ischemia. Noninvasive techniques are needed to re-examine our reliance on coronary angiography and to explore the clinical value of the physiological assessment of coronary artery stenoses. Such noninvasive techniques might become important tools in the future following an overall evaluation of coronary morphology, myocardial function and perfusion ascertained by all available methods.