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Journal of Diagnostic Medical Sonography
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Pulsed Doppler Echoca rd iographic Measurement of Pulmonary Acceleration Time in Diagnosing Patients With Pulmonary Hypertension

Sandra K. Miller, BA, RDCS

16A Quail Ridge Court, Owensboro, KY 42303.

Doppler echocardiography offers a quick, non-invasive way to detect evidence of pulmonary hypertension. Most laboratories routinely measure the velocity of the jet of tricuspid regurgitation when present and use the modified Bernoulli equation to estimate pulmonary artery systolic pressure. Another echocardiographic method for detecting elevated pulmonary pressure is to measure the duration of the acceleration phase of pulmonary systolic flow. The purpose of this study was to assess the reliability of the pulmonary acceleration time and the correlation with the Bournoulli method in determining the severity of pulmonary hypertension and the reliability of pulmonary acceleration time to distinguish normal patients from those with pulmonary hypertension.

We evaluated 56 patients with suitable Doppler tracings for pulmonary acceleration time and tricuspid regurgitation. Our results suggest that pulmonary acceleration time, when used correctly, is a useful tool in evaluating patients for pulmonary hypertension. Although pulmonary acceleration time cannot precisely estimate severity, it continues to have a valuable role in an echocardiographic examination to separate patients with and without pulmonary hypertension.

Key Words: pulmonary acceleration time • pulmonary hypertension • tricuspid regurgitation

Journal of Diagnostic Medical Sonography, Vol. 11, No. 5, 241-245 (1995)
DOI: 10.1177/875647939501100503
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