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Doppler waveform parvus and tardus. A sign of proximal flow obstruction.
Author(s) -
Kotval P S
Publication year - 1989
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.7863/jum.1989.8.8.435
Subject(s) - medicine , cardiology , waveform , sign (mathematics) , doppler effect , doppler ultrasound , flow (mathematics) , collateral circulation , mechanics , mathematical analysis , physics , mathematics , quantum mechanics , voltage , astronomy
The Doppler linear flow velocity versus time spectrum obtained in an arterial flow system in which there is proximal occlusive disease with or without collateral formation has a tardus‐parvus waveform. The conditions that cause this Doppler sign are due to a poststenotic pressure drop.
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