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Intermediate coronary artery stenosis: evidence-based decisions in interventions to avoid the oculostenotic reflex
Chandrashekhar V Patil1, Rafael Beyar
1Rambam Medical Center and Rappaport Faculty of Medicine-Technion, Israel.
Insights
Intermediate coronary artery stenosis is common in patients undergoing percutaneous coronary intervention (PCI). Combining imaging with physiologic assessment improves treatment decisions, avoiding unnecessary interventions.
Area of Science:
- Cardiology
- Interventional Cardiology
- Medical Imaging
Background:
- Intermediate coronary artery stenosis (40-70% diameter stenosis) is prevalent in patients undergoing percutaneous coronary intervention (PCI).
- Coronary angiography, while the gold standard for anatomical assessment, has limitations.
- Physiologic assessment methods using sensor-tipped guidewires are increasingly important.
Purpose of the Study:
- To highlight the prevalence of intermediate coronary artery stenosis.
- To emphasize the limitations of coronary angiography.
- To advocate for a combined approach in stenosis assessment.
Main Methods:
- Review of current diagnostic standards for coronary artery stenosis.
- Discussion of sensor-tipped guidewire technologies for physiologic assessment.
- Analysis of decision-making processes in the catheterization laboratory.
Main Results:
- Intermediate stenosis is common and poses diagnostic challenges.
- Physiologic measures like fractional flow reserve (FFR) and coronary flow reserve (CFR) provide crucial functional information.
- A combined morphologic and physiologic approach offers superior guidance for therapy.
Conclusions:
- Integrating coronary angiography with physiologic assessment is essential for optimal patient management.
- This combined approach helps avoid the 'oculostenotic reflex' and guides appropriate therapy.
- Evidence-based decision-making in interventional cardiology benefits from a comprehensive stenosis evaluation.
Abstract:
The prevalence of intermediate coronary artery stenosis (defined as a diameter stenosis of 40% to 70%) is quite large in patients undergoing PTCA. The coronary angiogram is considered the 'gold standard' for the definition of coronary anatomy, in spite of various limitations associated with its use. In recent years, sensor tipped guidewire based methods of physiologic assessment of stenosis severity, like myocardial fractional flow reserve, and poststenotic coronary flow reserve had established their role in the decision making in catheterization laboratory. The decision making should combine morphologic and physiologic assessment as better evidence based approach in guiding therapy to avoid the 'oculostenotic reflex'.