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Distribution of cardiac output in ovine pregnancy
Abstract
Cardiac output and organ blood flows were measured in 6 nonpregnant and 24 pregnant ewes from 38 to 141 days of gestation employing radionuclide-labeled microspheres. From the nonpregnant state to term increases in cardiac output, from 73.7 +/- 4.6 ml/min-kg of maternal weight to 148 +/- 2.4 ml/min-kg, and heart rate, from 88.5 +/- 10.3 to 106 +/- 4.6 beats/min, were noted, while mean arterial blood pressure was unchanged. Near term, the blood flows to the uterus and mammary gland represented approximately 18% of cardiac output. The blood flow to nonreproductive organs increased from 76.6 +/- 6.8 ml/min-kg of nonreproductive tissue in the nonpregnant state to 132 +/- 3.5 ml/min-kg at 130-140 days' gestation (P less than 0.01). No significant changes in renal blood flow were detected.
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Cited by
Changes in uterine blood flow during human pregnancy
Thaler, I., Manor, D., Itskovitz, J., Rottem, S., Levit, N., Timor-Tritsch, I., & Brandes, J. M. (1990) · American Journal of Obstetrics and Gynecology · doi:10.1016/0002-9378(90)90834-t · Cited by 288
Aetiology and pathogenesis of IUGR
Sankaran, S., & Kyle, P. M. (2009) · Best Practice & Research Clinical Obstetrics & Gynaecology · doi:10.1016/j.bpobgyn.2009.05.003 · Cited by 210
Nutritional Modulation of Adolescent Pregnancy Outcome – A Review
Wallace, J. M., Luther, J. S., Milne, J. S., Aitken, R. P., Redmer, D. A., Reynolds, L. P., & Hay, W. W. (2006) · Placenta · doi:10.1016/j.placenta.2005.12.002 · Cited by 120
Current topic: Comparative physiology of placental oxygen transport
Wilkening, R. B., & Meschia, G. (1992) · Placenta · doi:10.1016/0143-4004(92)90002-b · Cited by 82
Metadata
- Authors
- Rosenfeld, C. R.
- Venue
- American Journal of Physiology-Heart and Circulatory Physiology
- Publisher
- American Physiological Society
- Published
- 1977-03-01
- Volume
- 232
- Issue
- 3
- Pages
- H231-H235
- ISSN
- 0363-6135 (ISSN-L)
- 1522-1539
- OpenAlex
- W2415219074
- Cited by
- 174
- References
- 0
- FWCI
- 4.00
- Type
- journal article
- Language
- en
- Open access
- closed
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