Doppler echocardiography of the main stems of the pulmonary arteries in the normal human fetus

Chaoui, Rabih; Taddeï, F.; Rizzo, Giuseppe; Bast, C. de; Lenz, F.; Bollmann, Rainer

doi:10.1046/j.1469-0705.1998.11030173.x

Cited by 76 publications

(83 citation statements)

References 29 publications

(49 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…They found a reduced At/Et ratio in six fetuses that died from complication of pulmonary hypoplasia. Contrary to Fuke et al, Chaoui et al found, while also examining the pulmonary artery branches, that the At/Et ratio increases with advancing gestational age [8]. They state that the increasing value of the At/Et ratio reflects decreasing pulmonary resistance normal to advancing gestation.…”

Section: Discussionmentioning

confidence: 84%

See 1 more Smart Citation

Does corticosteroid therapy impact fetal pulmonary artery blood flow in women at risk for preterm birth?

et al. 2015

View full text Add to dashboard Cite

Aim: Maternal corticosteroid administration in pregnancy is known to enhance fetal lung maturity in at risk fetuses. The aim of this study was to test the hypothesis that corticosteroid therapy alters fetal pulmonary blood flow in pregnancies at risk for preterm birth (PTB). Material and methods: We prospectively evaluated main fetal pulmonary artery (MPA) blood flow in pregnant women at risk for PTB and treated with corticosteroids (betamethasone), compared to an uncomplicated cohort without steroid therapy. The Doppler indices of interest included Peak Systolic Velocity (PSV), Resistive Index (RI), Pulsatility Index (PI), Systolic/Diastolic ratio (S/D ratio), Acceleration Time (AT), and Acceleration Time/Ejection Time Ratio (AT/ ET ratio), with the latter serving as the primary outcomes due to its stability irrespective of gestational age. Results: When compared with controls, fetuses treated with corticosteroids demonstrated significantly decreased pulmonary artery acceleration time (median: 28.89 (22.22-51.11) vs. 33.33 (22.20-57.00), p=0.006), while all other indices remained similar. We found no difference in pulmonary blood flow between fetuses who developed respiratory distress syndrome (RDS) and those that did not (31.56 ± 6.842 vs. 32.36 ± 7.265, p= 0.76). Conclusion: Our data demonstrate altered fetal pulmonary blood flow with corticosteroid therapy, possibly due to increased arterial elastance brought on by medication effect, which leads to the decreased acceleration time or possible gestational age affect. Contrary to a recent report, we did not observe any Doppler differences in fetuses with RDS, which underscores the need for further examination of this proposed association.

show abstract

Section: Discussionmentioning

confidence: 84%

“…In our review of the literature we found many different approaches to assessment of fetal pulmonary blood flow (measurements, gate placement, sweep speed, etc). Even among those with similar approaches the findings are not consistent [8,9]. Studies that did not include At/ Et ratio have been excluded from the discussion.…”

Section: Discussionmentioning

confidence: 99%

Does corticosteroid therapy impact fetal pulmonary artery blood flow in women at risk for preterm birth?

et al. 2015

View full text Add to dashboard Cite

show abstract

“…62 Assessment of velocity waveforms of cardiac flow can be achieved using Doppler echocardiography. 9,17,44 Real-time blood motion imaging using color sonograms can be utilized. For this medical imaging modality, the speckle pattern from the blood flow signal is preserved, enhanced, and visualized.…”

Section: Comparison Of Pc-mri With Ultrasoundmentioning

confidence: 99%

Cardiac Flow Analysis Applied to Phase Contrast Magnetic Resonance Imaging of the Heart

et al. 2009

View full text Add to dashboard Cite

Abstract-Phase contrast magnetic resonance imaging is performed to produce flow fields of blood in the heart. The aim of this study is to demonstrate the state of change in swirling blood flow within cardiac chambers and to quantify it for clinical analysis. Velocity fields based on the projection of the three dimensional blood flow onto multiple planes are scanned. The flow patterns can be illustrated using streamlines and vector plots to show the blood dynamical behavior at every cardiac phase. Large-scale vortices can be observed in the heart chambers, and we have developed a technique for characterizing their locations and strength. From our results, we are able to acquire an indication of the changes in blood swirls over one cardiac cycle by using temporal vorticity fields of the cardiac flow. This can improve our understanding of blood dynamics within the heart that may have implications in blood circulation efficiency. The results presented in this paper can establish a set of reference data to compare with unusual flow patterns due to cardiac abnormalities. The calibration of other flow-imaging modalities can also be achieved using this well-established velocityencoding standard.

show abstract

“…Doppler examination of maternal and fetal vessels showed increased resistance in both uterine arteries with bilateral notches, as well as increased PI in both umbilical arteries, the descending aorta and in the RPA [3]. Ultrasound examination and fetal echocardiography using a high-resolution color Doppler system (ATL-HDI 5000, Philips-Solingen, Germany) revealed a normally structured heart and sinus rhythm.…”

Section: Case Reportmentioning

confidence: 99%

Longitudinal observation of deterioration of Doppler parameters, computerized cardiotocogram and clinical course in a fetus with growth restriction

Machlitt

Wauer²,

Chaoui³

2001

Journal of Perinatal Medicine

View full text Add to dashboard Cite

We report on a fetus with intrauterine growth restriction detected at 27 weeks' gestation, who was longitudinally followed up until delivery by cesarean section 33 days later (31 + 5 weeks) due to severe decelerations in CTG. Longitudinal Doppler assessment of the umbilical artery (UA), the middle cerebral artery (MCA) and the main branch of the right pulmonary artery (RPA), the ductus venosus (DV) and the left coronary artery was compared to clinical course and computerized CTG. At first presentation (day--33) increased resistance in both the UA and uterine arteries with bilateral notches was found. Absent enddiastolic flow (AED) in the UA was found at day--19 and reverse flow (RED) at day--11. The MCA showed a decreased pulsatility first at day--19 and again at day--11 together with RED in the UA. The RPA initially (day--33) showed increased PI which returned to normal values at day--19 but increased again at day--1, when the DV showed RED and the coronary arteries became visible. The DV was normal until day--11, then its PI began to increase together with occurence of RED in the UA, but reverse flow in the DV occurred only on the eve (day--1) of severe decelerations in CTG. Short-term variability in computerized CTG was stable at 6 to 7 ms, except for an intermediate drop to 4 ms at day--10. Maternal hypertension was found at day--19 and mild preeclampsia developed at day--12. A reduction of fetal movements was noticed at day--5. This report shows that at 29 weeks gestation despite detection of AED resp. RED in the UA a prolongation of pregnancy for 19 resp. 11 days is possible. In addition to abnormal CTG, late signs of fetal deterioration are reverse flow in the DV and visibility of the coronary arteries. The role of increased resistance in the main branches of the pulmonary arteries should be examined in the future.

show abstract

Doppler echocardiography of the main stems of the pulmonary arteries in the normal human fetus

Cited by 76 publications

References 29 publications

Does corticosteroid therapy impact fetal pulmonary artery blood flow in women at risk for preterm birth?

Does corticosteroid therapy impact fetal pulmonary artery blood flow in women at risk for preterm birth?

Cardiac Flow Analysis Applied to Phase Contrast Magnetic Resonance Imaging of the Heart

Longitudinal observation of deterioration of Doppler parameters, computerized cardiotocogram and clinical course in a fetus with growth restriction

Contact Info

Product

Resources

About