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Updated: Oct 1, 2025

Standardized Technique of Aortic Valve Re-implantation for Valve-sparing Aortic Root Replacement
Published on: December 11, 2017
Constrictive pericarditis 20 years after surgical aortic valve replacement.
Toshinori Nishizawa1,2, Shosei Ro3, Taku Asano4
1Department of General Internal Medicine St Luke's International Hospital Tokyo Japan.
Right heart catheterization reveals elevated right ventricular pressure, a prominent "y" descent (Friedreich's sign), and a dip-and-plateau pattern. These findings are indicative of specific cardiac conditions.
Area of Science:
- Cardiology
- Hemodynamics
- Diagnostic Medicine
Background:
- Right heart catheterization is a key diagnostic tool for assessing cardiac pressures.
- Specific pressure waveforms can indicate various cardiovascular pathologies.
Purpose of the Study:
- To describe the characteristic findings of right heart catheterization in patients with specific cardiac conditions.
- To correlate hemodynamic measurements with clinical signs.
Main Methods:
- Right heart catheterization was performed.
- Hemodynamic parameters including right ventricular pressure were measured.
- Waveform analysis identified "y" descent and ventricular pressure configuration.
Main Results:
- Elevated right ventricular pressure was observed.
- A prominent "y" descent, identified as Friedreich's sign, was noted.
- A characteristic dip-and-plateau pressure configuration was present.
Conclusions:
- The combination of elevated right ventricular pressure, Friedreich's sign, and dip-and-plateau configuration is diagnostic.
- These hemodynamic findings are crucial for diagnosing conditions affecting right ventricular function and filling.
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