In vitro Doppler assessment of pressure gradients across modified Blalock-Taussig shunts.
The relation between flow velocity and the pressure decrease is evaluated in Blalock-Taussig shunts used in congenital heart surgery and is related to the flow conditions and geometries of the shunts studied. The authors propose that the flow conditions within the shunt as well as shunt dimensions need to be taken into account when using Doppler velocimetry to predict pressure drops across these shunts.
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Cardiac Dynamics Laboratory, Children's Hospital of Pittsburgh, University of Pittsburgh, Pennsylvania 15213, USA.
Whitehead
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Cape
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D000293:Adolescent; D000328:Adult; D001166:Arteriovenous Shunt, Surgical; D016010:Binomial Distribution; D001783:Blood Flow Velocity; D002648:Child; D015150:Echocardiography, Doppler; D005260:Female; D006801:Humans; D006874:Hydrostatic Pressure; D008297:Male; D011673:Pulsatile Flow; D013771:Tetralogy of Fallot / Q000000981:diagnostic imaging* / Q000503:physiopathology* / Q000601:surgery