Use of multiple views in the echocardiographic assessment of pulmonary artery systolic pressure.

The purpose of this study was to determine which echocardiographic views most reliably demonstrate the maximum velocity of a tricuspid regurgitant jet in the evaluation of pulmonary artery systolic pressure. Consecutive patients seen in three echocardiographic laboratories during a 3-month period were enrolled. A complete Doppler examination was performed on each patient, including a continuous-wave Doppler evaluation of tricuspid regurgitation in each of seven views. All seven views were used to determine the maximum velocity of tricuspid regurgitation. Of the 1163 studies, 866 (75%) had some tricuspid regurgitation by color-flow Doppler and 614 (53%) had a measurable velocity of tricuspid regurgitation in at least one view. No single echocardiographic view consistently yielded the maximum velocity of tricuspid regurgitation. The apical four-chamber view alone was inadequate. All seven views must be used to be certain that the maximum velocity of tricuspid regurgitation has been obtained.