Understanding continuous-wave Doppler signal intensity as a measure of regurgitant severity.
1997 (English)In: Journal of the American Society of Echocardiography, ISSN 0894-7317, E-ISSN 1097-6795, Vol. 10, no 6, 613-622 p.Article in journal (Refereed) Published
Continuous-wave Doppler signal intensity is commonly expected to reflect the severity of mitral regurgitation. Physical principles predict that alignment of the imaging beam, flow velocity, and turbulence can also be important or even dominant determinants of continuous-wave Doppler signal intensity. The reliability of tracking regurgitant severity with continuous-wave Doppler signal intensity was assessed in vitro with varying volume, velocity, turbulence, and beam alignment. The conditions wherein continuous-wave Doppler signal intensity increased with regurgitant volume were specific but poorly predictable combinations of orifice size, flow volume, and perfect beam alignment. Under other conditions flow velocity and turbulence effects dominated, and continuous-wave Doppler signal intensity did not reflect changing regurgitant volume. Continuous-wave Doppler signal intensity-based impressions of regurgitant severity may be unreliable and even misleading under some circumstances.
Place, publisher, year, edition, pages
1997. Vol. 10, no 6, 613-622 p.
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:liu:diva-116904PubMedID: 9282351OAI: oai:DiVA.org:liu-116904DiVA: diva2:801443