[Evaluation of pulmonary systolic arterial pressures by continuous Doppler in tricuspid regurgitation in adults. Apropos of 43 cases].

Forty-three hospital patients with tricuspid regurgitation were prospectively explored by continuous wave Doppler ultrasound to determine their pulmonary systolic arterial pressure. In the absence of pathology of the pulmonary orifice this value corresponds to the sum of the right atrioventricular systolic gradient calculated by Bernoulli's equation DP = 4V2 from the tricuspid regurgitation and the right atrial pressure evaluated by clinical examination. The values obtained are compared with the results of right heart catheterization. Our study showed good correlation (r = 0.90) with a standard error of 8.2 mmHg, the main source of effort being the clinical quantification of right atrial pressure. These results confirm that pulmonary systolic arterial pressure can reliably be measured by this method in the presence of tricuspid regurgitation. The method is of considerable interest in permanent pulmonary hypertension or in emergencies.