Significant Drop in Right Atrial Pressure Does Not Influence Fractional Flow Reserve Coronary Assessment.

Area of Science:

• Cardiology
• Interventional Cardiology
• Cardiac Physiology

Background:

• Fractional flow reserve (FFR) is crucial for diagnosing coronary artery disease.
• The influence of elevated right atrial pressure on FFR is not well understood.
• Transcatheter tricuspid valve interventions offer a unique physiological model to study central venous pressure effects.

Observation:

• A patient with a degenerated surgical tricuspid bioprosthesis underwent transcatheter tricuspid valve-in-valve replacement.
• Coronary functional assessment using FFR was performed concurrently.
• Right atrial pressure was significantly reduced post-intervention.

Findings:

• The significant decrease in right atrial pressure did not alter FFR measurements.
• This occurred in the context of angiographically confirmed mild coronary artery disease.
• The study provides in-vivo evidence regarding central venous pressure and FFR.

Implications:

• Central venous pressure may have a limited impact on FFR measurements in specific clinical scenarios.
• Further research is warranted to elucidate the relationship between right atrial pressure and coronary hemodynamics.
• These findings could refine the interpretation of FFR in patients with altered venous pressures.