Related Experiment Video
Updated: Aug 21, 2026
Point of Care Transcranial Color-Coded Duplex Ultrasound of the Middle Cerebral Artery
Published on: August 9, 2024
[Color M-mode Doppler for postoperative estimation of pulmonary capillary wedge pressure]
S Thierry1, D Thébert, E Brocas
1Service de chirurgie cardiaque, CHU Henri-Mondor, avenue du Maréchal-de-Lattre-de-Tassigny, 94010 Créteil, France. stephane.thierry@ch-sud-francilien.fr <stephane.thierry@ch-sud-francilien.fr>
Objective:
The aim of this study was to evaluate the accuracy of the combined index E/Vp (peak E velocity combined with color M-mode color Doppler flow propagation) for estimating pulmonary capillary wedge pressure, in post cardiac surgery patients.
Study Design:
Prospective clinical trial.
Patients And Methods:
In post cardiac surgery patients (D1), we have measured with transthoracic echocardiography peak early E transmitral pulsed Doppler velocities and color M-mode Doppler flow propagation velocity (Vp). The E/Vp ratio was compared with pulmonary capillary wedge pressure (PAPO) obtained simultaneously.
Results:
Thirty eight patients were studied. The coefficient of correlation between PAPO and E/Vp was r = 0.71 (p < 0.0001). The sensitivity and the specificity of E/Vp > 1.5 for prediction of PAPO > 15 mmHg were 79% and 79% respectively.
Conclusion:
In post cardiac surgery patients, PAPO can be reasonably estimated by measuring the ratio E/Vp obtained with Doppler echocardiography.
Related Concept Videos
01:17Assessment of Diffusion and Perfusion
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...
01:19Assessing Blood pressure using a doppler ultrasound
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment: