Abnormal ductus venosus waveforms
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Abnormal waveforms in fetal ductus venosus flow assessment can occur in a number of situations which include
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aneuploidic anomalies
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Down syndrome:
~around 80% are thought to have abnormal waveforms
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Down syndrome:
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congenital cardiac anomalies
- fetal pulmonary arterial anomalies
- fetal arteriovenous malformations leading to shunting
- fetal tumours that lead to arterio-venous shunting
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twin to twin transfusion syndrome:
recipientrecipient twin - maternal diabetes: may exhibit increased PI values 7
Abnormal waveforms include
- reduction flow in ductus venosus A wave
- absent flow in ductus venosus A wave
- reversal of flow in ductus venosus A wave
- abnormal indices:
- abnormal pulsatility index (PI)
- abnormal S wave to A wave ratio (S
: A:A) - abnormal peak velocity index
Growth restricted fetuses with abnormal ductus venous flow have worse perinatal outcome compared to those where flow abnormality is confined to the umbilical or middle cerebral artery 8.
-<p><strong>Abnormal waveforms </strong>in <a href="/articles/fetal-ductus-venosus-flow-assessment" title="fetal ductus venosus flow assessment">fetal ductus venosus flow assessment</a> can occur in a number of situations which include</p><ul>- +<p><strong>Abnormal waveforms </strong>in <a href="/articles/fetal-ductus-venosus-flow-assessment">fetal ductus venosus flow assessment</a> can occur in a number of situations which include</p><ul>
-<a href="/articles/aneuploidic-anomalies" title="aneuploidic anomalies">aneuploidic anomalies</a><ul><li>-<a href="/articles/down-syndrome" title="Down syndrome">Down syndrome</a> : ~ 80% are thought to have abnormal waveforms</li></ul>- +<a href="/articles/aneuploidic-anomalies">aneuploidic anomalies</a><ul><li>
- +<a href="/articles/down-syndrome">Down syndrome</a>: around 80% are thought to have abnormal waveforms</li></ul>
-<a href="/articles/congenital-cardiovascular-anomalies" title="Congenital cardiac anomalies">congenital cardiac anomalies</a><ul><li>fetal pulmonary arterial anomalies-<ul>-<li><a href="/articles/congenital-pulmonary-stenosis" title="Congenital pulmonary stenosis">congenital pulmonary stenosis</a></li>-<li>-<a href="/articles/congenital-pulmonary-stenosis" title="Congenital pulmonary stenosis"></a><a href="/articles/pulmonary-atresia" title="Pulmonary atresia">pulmonary atresia</a>-</li>- +<a href="/articles/congenital-cardiovascular-anomalies">congenital cardiac anomalies</a><ul><li>fetal pulmonary arterial anomalies<ul>
- +<li><a href="/articles/congenital-pulmonary-stenosis">congenital pulmonary stenosis</a></li>
- +<li><a href="/articles/pulmonary-atresia">pulmonary atresia</a></li>
-<a href="/articles/fetal-arteriovenous-malformations" title="fetal arteriovenous malformations">fetal arteriovenous malformations</a> leading to shunting-<ul><li><a href="/articles/vein_of_galen_malformation" title="Vein of Galen malformation">vein of Galen malformation</a></li></ul>- +<a href="/articles/fetal-arteriovenous-malformations">fetal arteriovenous malformations</a> leading to shunting<ul><li><a href="/articles/vein-of-galen-malformation-1">vein of Galen malformation</a></li></ul>
-<a href="/articles/fetal-tumours" title="Fetal tumours">fetal tumours</a> that lead to arterio-venous shunting-<ul>-<li><a href="/articles/sacrococcygeal-teratoma" title="Sacrococcygeal teratoma">sacrococcygeal teratoma</a></li>-<li><a href="/articles/epignathus" title="Epignathus">epignathus</a></li>- +<a href="/articles/fetal-tumours">fetal tumours</a> that lead to arterio-venous shunting<ul>
- +<li><a href="/articles/sacrococcygeal-teratoma">sacrococcygeal teratoma</a></li>
- +<li><a href="/articles/epignathus">epignathus</a></li>
-<a href="/articles/twin-twin-transfusion-syndrome-1" title="Twin to Twin transfusion syndrome (TTTS)">twin to twin transfusion syndrome</a> : recipient twin</li>- +<a href="/articles/twin-twin-transfusion-syndrome-1">twin to twin transfusion syndrome</a>: recipient twin</li>
-<a href="/articles/fetal-conditions-associated-with-maternal-diabetes" title="Fetal conditions associated with maternal diabetes">maternal diabetes</a> : may exhibit increased PI values <sup>7</sup>- +<a href="/articles/fetal-conditions-associated-with-maternal-diabetes">maternal diabetes</a>: may exhibit increased PI values <sup>7</sup>
-<li>abnormal indices-<ul>- +<li>abnormal indices:<ul>
-<li>abnormal S wave to A wave ratio (S : A)</li>- +<li>abnormal S wave to A wave ratio (S:A)</li>
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