Pulmonary Capillary Wedge Pressure by Tissue Doppler Echo
Formula:PCWP = 1.55 + 1.47(Emax/Emax')
How to calculate Pulmonary Capillary Wedge Pressure by Tissue Doppler Echo.
Obtain a PWD of the long axis view of the mitral valve. The PWD will yield a E and A wave. The maximum E wave velocity, Emax should be measured and entered above.
Obtain a TDI scan of the mitral valve. A TDI scan of the mitral valve is a tissue color mode scan with pulse wave doppler of the mitral valve annulus. After initiating the scan a velocity profile will be exhibited that is similar to the PWD of the LVI. An early velocity peak, the E´ and a late velocity peak, the A´ are present. The maximum velocity of the E´ velocity profile is the Emax´.