PMID: 9170473Jun 1, 1997Paper

Umbilical venous velocity pulsations are related to atrial contraction pressure waveforms in fetal lambs

Obstetrics and Gynecology
K L ReedA T Newman

Abstract

To identify the source of umbilical venous velocity pulsations, times of transmission from the atrial contraction pressure waveform to velocity waves in the inferior vena cava, ductus venosus, intra-abdominal umbilical vein, and intra-amniotic umbilical vein were examined. Five lamb fetuses at 125-135 days' gestation were instrumented with solid state pressure transducers in the inferior vena cava, fluid-filled catheters in the inferior vena cava and descending aorta, and epicardial pacemakers. Three to 5 days postoperatively, inferior vena cava, ductus venosus, and umbilical vein velocities were examined with Doppler ultrasound. Normal saline was administered and umbilical vein velocity pulsations developed (180 +/- 60 mL). In three fetuses, premature atrial contractions were induced under baseline conditions and after umbilical vein velocity pulsations developed. Times of transmission from the atrial contraction pressure waveform until velocity decreases in the fetal venous system were significantly different in the inferior vena cava, ductus venosus, intra-abdominal umbilical vein, and intra-amniotic umbilical vein (P < .001). Times increased with the distance from the atrium. Inferior vena cava pressure increased with fluid...Continue Reading

References

Jan 1, 1991·American Journal of Obstetrics and Gynecology·S GudmundssonS Weiner

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Citations

Aug 12, 1999·Heart and Vessels·L R HellevikM Hanson
Feb 13, 2001·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·A A BaschatC R Harman
Feb 13, 2001·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·A A BaschatC R Harman
Oct 18, 2002·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·A A Baschat, U Gembruch
Jan 16, 1998·Clinical Obstetrics and Gynecology·K L Reed
Nov 20, 2002·Clinical Obstetrics and Gynecology·Michael Y Divon, Asaf Ferber
Dec 10, 2009·Current Opinion in Obstetrics & Gynecology·Camille Hoffman, Henry L Galan
Jun 30, 2000·Journal of Perinatal Medicine·T Kiserud
Apr 14, 2000·American Journal of Obstetrics and Gynecology·K L Reed, C F Anderson
Feb 11, 2004·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·S M SkulstadS Rasmussen
Aug 24, 2005·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·M TchirikovH J Schröder
Jul 11, 2006·Ultrasound in Obstetrics & Gynecology : the Official Journal of the International Society of Ultrasound in Obstetrics and Gynecology·C BergU Gembruch
Oct 17, 1998·Journal of Perinatal Medicine·J Gardosi

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