+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Fetal pulmonary artery and aorta: two-dimensional Doppler echocardiography

, : Fetal pulmonary artery and aorta: two-dimensional Doppler echocardiography. Obstetrics and Gynecology 69(2): 175-178

Two-dimensional and pulsed Doppler ultrasound techniques were used to examine 87 fetuses between 17 and 41 weeks' gestation in order to compare pulmonary artery and aortic outflow diameters, mean and maximal flow velocities, and transvalve flows. For purposes of analysis, fetuses were divided into two groups: those less than 31 weeks, and those of 31 weeks or more. Diameters of the pulmonary artery and aortic outflow region increased with advancing gestational age (P less than .001), while mean and maximal Doppler flow velocities did not change. Transvalve volume flow increased across both regions (pulmonary artery from 381 +/- 12 mL/minute to 530 +/- 13 mL/minute and aortic outflow from 286 +/- 10 mL/minute to 410 +/- 13 mL/minute, P less than .001) with advancing gestation. Pulmonary artery diameters were larger than aortic outflow diameters in both groups (P less than .01), while mean Doppler flow velocities were not significantly different. Maximal Doppler flow velocities were greater in the aorta than in the pulmonary artery (P less than .001), and transvalve flow was greater across the pulmonary artery than the aorta in both groups (P less than .05, ratio 1.3:1). This work demonstrates differences in fetal pulmonary artery and aortic outflow anatomy and physiology that must be considered in evaluating studies of fetal cardiac physiology.


PMID: 3808503

Other references

Lamerton, R., 1973: Care of the dying. 7. Religion and the care of the dying. Nursing Times 69(3): 88-89

Lembert, N.; Wesche, J.; Petersen, P.; Doser, M.; Zschocke, P.; Becker, H.D.; Ammon, H.P.T., 2005: Encapsulation of islets in rough surface, hydroxymethylated polysulfone capillaries stimulates VEGF release and promotes vascularization after transplantation. The transplantation of encapsulated islets of Langerhans is one approach to treat type 1 diabetes without the need of lifelong immunosuppression. Capillaries have been used for macroericapsulation because they have a favorable surface-to-volume ra...

Sharma, B.; Erdman, R., 1988: Potential interaction between choline and methionine in lactating dairy cows. Proceedings yland Nutrition Conference for Feed Manufacturers: 5-80

Northup, J.; Fusilier, I.; Swanson, V.; Huete, J.; Bruce, T.; Freeland, J.; Gulley, V.; Edwards, S., 1999: Further analysis of the separate and interactive effects of methylphenidate and common classroom contingencies. We evaluated separate and interactive effects between common classroom contingencies and methylphenidate (MPH) on disruptive and off-task behaviors for 4 children with a diagnosis of attention deficit hyperactivity disorder. Analogue conditions co...

Weissferdt, A.; Kalhor, N.; Moran, C.A., 2016: Thymomas With Extensive Clear Cell Component:  A Clinicopathologic and Immunohistochemical Study of Nine Cases. Nine cases of thymomas with an extensive clear cell component are presented. The patients were six men and three women aged between 45 and 62 years (mean, 52 years). Presenting symptoms included shortness of breath, chest pain, and cough. Diagnost...

Ross, J., S.; Robertson, J., T.; Frederickson, R., C.A.; Petrie, J., L.; Obuchowski, N.; Modic, M., T.; Detribolet, N., 1996: Association between peridural scar and recurrent radicular pain after lumbar discectomy: Magnetic resonance evaluation. The purpose of this study was to investigate the presence of any correlation between recurrent radicular pain during the first six months following first surgery for herniated lumbar intervertebral disc and the amount of lumbar peridural fibrosis...

Letoffe, S.; Redeker, V.; Wandersman, C., 1998: Isolation and characterization of an extracellular haem-binding protein from Pseudomonas aeruginosa that shares function and sequence similarities with the Serratia marcescens HasA haemophore. The major mechanism by which bacteria acquire free or haemoglobin-bound haem involves direct binding to specific outer membrane receptors. Serratia marcescens also secretes a haem-binding protein, HasA, which functions as a haemophore that catches...

Iseki, N.; Hasegawa, J.; Hayama, S.I.hi; Masunaga, S., 2002: The current status of dioxin pollution and its intrinsic effects on Great Cormorants in Japan An overview. In this paper we outline the history of toxic contaminants in wild birds in Japan. Pollution by dioxin and dioxin-like compounds has become a common issue in recent decades. As such pollution poses a considerable health probem, countermeasures and...

Parada, J.L.; Pamies D.G.acchi, M., 1986: Resistance of Streptococcus lactis mutants to b-lactam antibiotics. Journal of Dairy Science 69: 31-7

Shakhbazov V.G., 1989: A new concept of the role of temperature in the formation of the bioelectrical potential and genetic functions of a cell nucleus. The effect of the temperature regimens of development on the formation of the bioelectrical potential of cell nuclei was studied in establish a correlation between temperature and nuclear potential. Cell microelectrophoresis was used to determine...