Doppler waveforms
Updates to Article Attributes
Body
was changed:
Doppler waveforms are often misinterpreted and/or overlooked. They can provide great deal of information if carefully understood.
Radiographic features
Ultrasound
Doppler
When interrogating flow with spectral Doppler, the three basic arterial waveforms are 1,2:
-
triphasic
- forward flow in systole
- reverse flow in late systole / early diastole
- forward flow in late diastole
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biphasic:having two phases or variations having forward and reverse flow 7
- reverse flow in diastole
- steady positive flow in the diastole, or
- forward flow in systole
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monophasic:single phase with slow (dampened flow) acceleration/deceleration
- low velocity
- high velocity
Triphasic arterial flow is considered normal and monophasic flow is considered abnormal. Most authors consider biphasic flow abnormal, although some authors classify it as a normal waveform 2.
Pulsatile venous flow is considered abnormal and is suggestive of elevated pressures in the right atrium 8.
-<p><strong>Doppler waveforms </strong>are often misinterpreted and/or overlooked. They can provide great deal of information if carefully understood.</p><h4>Radiographic features</h4><h5>Ultrasound</h5><h6>Doppler</h6><p>When interrogating flow with <a title="Spectral Doppler (ultrasound)" href="/articles/spectral-doppler-ultrasound">spectral Doppler</a>, the three basic arterial waveforms are <sup>1,2</sup>:</p><ul>- +<p><strong>Doppler waveforms </strong>are often misinterpreted and/or overlooked. They can provide great deal of information if carefully understood.</p><h4>Radiographic features</h4><h5>Ultrasound</h5><h6>Doppler</h6><p>When interrogating flow with <a href="/articles/spectral-doppler-ultrasound">spectral Doppler</a>, the three basic arterial waveforms are <sup>1,2</sup>:</p><ul>
-</ul><p>Triphasic flow is considered normal and monophasic flow is considered abnormal. Most authors consider biphasic flow abnormal, although some authors classify it as a normal waveform <sup>2</sup>. </p>- +</ul><p>Triphasic arterial flow is considered normal and monophasic flow is considered abnormal. Most authors consider biphasic flow abnormal, although some authors classify it as a normal waveform <sup>2</sup>. </p><p>Pulsatile venous flow is considered abnormal and is suggestive of elevated pressures in the right atrium <sup>8</sup>.</p>
References changed:
- 6. Abu-Yousef MM, Kakish ME, Mufid M. Pulsatile venous Doppler flow in lower limbs: highly indicative of elevated right atrium pressure. (2013) AJR. American journal of roentgenology. 167 (4): 977-80. <a href="https://doi.org/10.2214/ajr.167.4.8819397">doi:10.2214/ajr.167.4.8819397</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/8819397">Pubmed</a> <span class="ref_v4"></span>
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