How to calculate Right Ventricular Systolic Pressure.
Obtain a CWD of the long axis view of the tricuspid valve. Tricuspid regurgitation must be present to make this calculation. Tricuspid regurgitation is present in most normal individuals so this calculation should be able to be made in almost everyone. A CWD of the TR jet will yield a peak velocity. Four times the square of the peak velocity of the TR jet yields the peak pressure during right ventricular systole. The RVSP will equal the PASP if pulmonary stenosis or a RVOT outlet obstruction is absent.