Intracoronary pressure and flow velocity for hemodynamic evaluation of coronary stenoses

Area of Science:

• Cardiovascular Medicine
• Interventional Cardiology
• Diagnostic Imaging

Background:

• Percutaneous coronary intervention (PCI) patient selection is critical for minimizing complications.
• Objective evidence of myocardial ischemia is essential for managing coronary artery disease (CAD), especially in multivessel disease and intermediate lesions.
• Current methods like fractional flow reserve (FFR) and coronary flow velocity reserve (CFVR) use single measurements (pressure or flow), potentially leading to ambiguity.

Purpose of the Study:

• To highlight the importance of accurate patient selection for PCI.
• To emphasize the need for objective evidence of myocardial ischemia.
• To advocate for simultaneous pressure and flow measurements for comprehensive hemodynamic assessment in coronary circulation.

Main Methods:

• Utilized sensor-equipped guidewires for assessing functional coronary lesion severity in the catheterization laboratory.
• Reviewed indices derived from pressure (e.g., FFR) and flow (e.g., CFVR) measurements.
• Discussed the limitations of single-parameter indices and the benefits of simultaneous pressure and flow assessment.

Main Results:

• Indices like FFR and CFVR show high agreement with noninvasive stress testing.
• However, relying solely on pressure or flow measurements can lead to ambiguous interpretations of coronary hemodynamics.
• Simultaneous measurement of both pressure and flow is proposed to avoid misinterpretation.

Conclusions:

• Comprehensive hemodynamic assessment requires evaluating both coronary pressure and flow simultaneously.
• This integrated approach is crucial for accurate functional lesion severity assessment and optimal patient selection for PCI.
• Simultaneous pressure and flow measurement can prevent misinterpretation and improve clinical decision-making in CAD management.