Abstract:
:Magnesium sulfate is primarily used for its anticonvulsive effects in treating hypertensive disorders of pregnancy. However, we have frequently observed significant falls in blood pressure in patients suffering from severe pregnancy-induced hypertension in whom little or no additional hypotensive medication was necessary for maintenance of diastolic blood pressure at 90 to 100 mm Hg while using recommended doses of this drug. We compared resting mean arterial pressure and vascular response to infusions of 50 ng/kg/min of angiotensin II and 2500 ng/kg/min of Levophed (norepinephrine) before and during infusion of a loading dose of 200 mg of magnesium sulfate intravenously in 15 minutes, followed by continuous infusions of 50 and 100 mg/hr intravenously in chronically prepared virgin (n = 14) and primigravid (n = 12) rabbits at 24 to 28 days' gestation (term = 30 +/- 1 day). Resting mean arterial pressure and vascular response to angiotensin II and norepinephrine were significantly decreased in the primigravid and virgin animals. Magnesium sulfate may attenuate blood pressure by decreasing the vascular response to pressor substances.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Lee MI,Todd HM,Bowe Adoi
10.1016/0002-9378(84)90106-6subject
Has Abstractpub_date
1984-08-01 00:00:00pages
705-8issue
7eissn
0002-9378issn
1097-6868pii
0002-9378(84)90106-6journal_volume
149pub_type
杂志文章abstract:OBJECTIVE:Our purpose was to investigate levels of fetal fibronectin in maternal plasma, amniotic fluid, and umbilical cord plasma from patients with severe preeclampsia. STUDY DESIGN:The study group comprised 20 patients with severe preeclampsia (group A). An antepartum comparison group was composed of 20 healthy pat...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(95)90587-1
更新日期:1995-02-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to understand the relationship between daily contextual factors and oral contraceptive (OC) adherence among students who attend college or graduate school. STUDY DESIGN:Data on OC adherence, demographics, contextual factors, and side-effects were collected as part of the accepta...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.ajog.2010.05.039
更新日期:2010-10-01 00:00:00
abstract:OBJECTIVE:Placental lipid peroxides and thromboxane are abnormally increased in preeclampsia. Thromboxane is a potent vasoconstrictor of the placental vasculature. Peroxides stimulate cyclooxygenase (prostaglandin H synthase), and thereby could increase thromboxane, to cause vasoconstriction in the placenta. This study...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(93)90044-j
更新日期:1993-10-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to estimate the effect of an interpersonally oriented intervention on the reduction of the risk of postpartum depression in primiparous adolescents. STUDY DESIGN:We conducted a randomized controlled trial of 106 pregnant primiparous adolescents who were ≤17 years old at their fi...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.ajog.2012.12.036
更新日期:2013-03-01 00:00:00
abstract::Imaging currently plays a limited role in the investigation of pelvic floor disorders. It is obvious that magnetic resonance imaging has limitations in urogynecology and female urology at present due to cost and access limitations and due to the fact that it is generally a static, not a dynamic, method. However, none ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1016/j.ajog.2009.08.018
更新日期:2010-04-01 00:00:00
abstract::Nifedipine is a calcium channel blocker that reduces blood pressure and increases renal blood flow. This double-blind investigation evaluated the effect of nifedipine in postpartum patients with severe preeclampsia. Thirty-one patients were randomized to receive either nifedipine (10 mg) or placebo every 4 hours begin...
journal_title:American journal of obstetrics and gynecology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/0002-9378(90)91011-z
更新日期:1990-03-01 00:00:00
abstract:OBJECTIVE:To compare maternal and neonatal outcomes between planned cesarean delivery and induction of labor in women with class III obesity (body mass index ≥40 kg/m(2)). STUDY DESIGN:In this retrospective cohort study, we identified all women with a body mass index ≥40 kg/m(2) who delivered a singleton at our instit...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2014.06.045
更新日期:2014-12-01 00:00:00
abstract:OBJECTIVE:We sought to evaluate changes in bowel symptoms after rectocele repair and identify risk factors for persistent symptoms. STUDY DESIGN:We conducted ancillary analysis of a randomized surgical trial for rectocele repair. Subjects underwent examinations and completed questionnaires for bowel symptoms at baseli...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.ajog.2012.06.054
更新日期:2012-11-01 00:00:00
abstract::Blue rubber bleb nevus syndrome is a disorder characterized by cutaneous and visceral venous malformations with a potential for life-threatening hemorrhage. Only 3 reports of blue rubber bleb nevus syndrome in pregnant women can be found by a Medline search. We present our experience in the management of this rare con...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2008.01.028
更新日期:2008-07-01 00:00:00
abstract:OBJECTIVE:The objective of the study was to assess whether herpes simplex virus antibody avidity is associated with risk of transmission of herpes simplex virus to the neonate. STUDY DESIGN:We developed a novel herpes simplex virus type 1 avidity test based on the commercially available Focus HerpeSelect-1 enzyme-link...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2006.02.013
更新日期:2006-07-01 00:00:00
abstract::Substance P is a neuropeptide that has been identified in the ovary, fallopian tube, uterus, and vagina and in the hypothalamic-pituitary axis in both an animal model and human ovaries. We sought to determine if substance P is present in peritoneal fluid and, if so, whether it correlated with the cause of infertility....
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(92)91852-2
更新日期:1992-01-01 00:00:00
abstract::Primary cancers of the vagina are rare. They comprise 1% to 2% of all gynecologic malignancies and occur predominantly in older women. The diagnosis of primary carcinoma of the vagina requires that the cervix and vulva be intact and that no clinical evidence of other primary tumors exist. Approximately 90% of all vagi...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1016/s0002-9378(12)90738-3
更新日期:1991-10-01 00:00:00
abstract:BACKGROUND:The effect of maternal mood disorders on neonatal measurements is not well-defined. The Fetal Growth Studies-Singletons provide a unique opportunity to evaluate the relationship between perceived maternal stress and neonatal growth measurements. OBJECTIVE:The purpose of this study was to determine whether p...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,多中心研究
doi:10.1016/j.ajog.2017.02.039
更新日期:2017-07-01 00:00:00
abstract:OBJECTIVE:We investigated maternal versus fetal genetic causes of preeclampsia and eclampsia by assessing concordance between monozygotic and dizygotic female co-twins, between female partners of male monozygotic and dizygotic twin pairs, and between female twins and partners of their male co-twins in dizygotic opposit...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1067/mob.2001.109400
更新日期:2001-02-01 00:00:00
abstract:OBJECTIVE:Our purpose was to test the hypothesis that lipopolysaccharide potentiates the transcription of human placental prostaglandin H synthase-2 gene, a rate-limiting enzyme in prostaglandin synthesis. STUDY DESIGN:We transfected normal term cytotrophoblasts with a reporter vector containing either prostaglandin H...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0002-9378(98)70422-3
更新日期:1998-03-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to evaluate the feasibility of fetoscopic surgery in complicated monochorionic and dichorionic triplet pregnancies. STUDY DESIGN:This was a case series of fetoscopic surgery in 12 cases of monochorionic (n = 5) or dichorionic (n = 7) triamniotic triplets complicated by severe fe...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,多中心研究
doi:10.1016/j.ajog.2004.06.039
更新日期:2004-11-01 00:00:00
abstract::The immediate postpartum period is a critical moment for contraceptive access and an opportunity to initiate long-acting reversible contraception, which includes the insertion of an intrauterine device. The use of the intrauterine device in the postpartum period is a safe practice with few contraindications and many b...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1016/j.ajog.2018.07.013
更新日期:2018-09-01 00:00:00
abstract:OBJECTIVE:We hypothesize that genetic variations (single nucleotide polymorphisms-SNPs) in the tumor necrosis factor-alpha (TNF-alpha), TNF receptors (TNFRI and TNFRII), interleukin-6 (IL-6) and IL-6 receptor (IL-6R) genes predict high-risk status for spontaneous preterm birth (sPTB) in European-American women. In this...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2006.03.059
更新日期:2006-06-01 00:00:00
abstract::Significant public health disparities exist surrounding teen and unplanned pregnancy in the United States. Women of color and those with lower education and socioeconomic status are at much greater risk of unplanned pregnancy and the resulting adverse outcomes. Unplanned pregnancies reduce educational and career oppor...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1016/j.ajog.2016.02.017
更新日期:2016-06-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to validate the performance of a laparoscopy-based model to predict optimal cytoreduction in advanced ovarian cancer patients. STUDY DESIGN:In a consecutive prospective series of 113 advanced ovarian cancer patients, the presence of omental cake, peritoneal and diaphragmatic ext...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2008.06.052
更新日期:2008-12-01 00:00:00
abstract:OBJECTIVE:This study determined whether attenuated preovulatory luteinizing hormone surges in aging rats are associated with a decrease in pituitary luteinizing hormone content or luteinizing hormone beta-messenger ribonucleic acid expression on proestrus. STUDY DESIGN:Blood samples were taken every 90 minutes from 1:...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/s0002-9378(11)91405-7
更新日期:1992-08-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to describe the evaluation and management of synthetic mesh-related complications after surgery for stress urinary incontinence (SUI) and/or pelvic organ prolapse (POP). STUDY DESIGN:We conducted a multicenter, retrospective analysis of women who attended 4 US tertiary referral ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,多中心研究
doi:10.1016/j.ajog.2013.10.012
更新日期:2014-02-01 00:00:00
abstract:OBJECTIVE:The purpose of this study was to determine how closely the surgically induced sheep myelomeningocele (MMC) model resembles the central nervous system derangements seen in human disease, and identify which aspects of MMC are the result of the early neuronal developmental defect, and which are secondary to the ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2005.02.110
更新日期:2005-10-01 00:00:00
abstract:OBJECTIVE:We compared preoperative and intraoperative assessments of pelvic organ prolapse to ascertain whether differences existed. STUDY DESIGN:This study is a retrospective analysis of information that was collected of 193 women who underwent reconstructive operation for pelvic organ prolapse between January 1994 a...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1067/mob.2002.122985
更新日期:2002-06-01 00:00:00
abstract::While observation of fetal breathing movements has been used in fetal assessment, quantitative parameters (percent time spent in breathing [incidence], breath rate, or breath rate variability) have not been adequately evaluated as predictive tools. We examined 283 patients with high-risk pregnancies between 32 and 42 ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(89)90112-9
更新日期:1989-01-01 00:00:00
abstract::In the roundtable that follows, clinicians discuss a study published in this issue of the Journal in light of its methodology, relevance to practice, and implications for future research. Article discussed: Maayan-Metzger A, Schushan-Eisen I, Todris L, et al. Maternal hypotension during elective cesarean section and s...
journal_title:American journal of obstetrics and gynecology
pub_type: 评论,杂志文章
doi:10.1016/j.ajog.2009.11.012
更新日期:2010-01-01 00:00:00
abstract::Alternatives to regimens with mifepristone and a prostaglandin analog for medical abortion emerged because of the need for accessible, effective, and safe options in areas of the world where mifepristone was unavailable. Studies of oral or intramuscular methotrexate combined with misoprostol have demonstrated complete...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章,评审
doi:10.1067/mob.2000.107949
更新日期:2000-08-01 00:00:00
abstract::This study was designed to test the hypothesis that maternal marijuana smoking impairs placental oxygen transfer in late ovine pregnancy by disrupting perfusion balance between the maternal and fetal placental circulations. Placental hemodynamics were assessed in nine chronically prepared ewes 1 hour after exposure to...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(88)90569-8
更新日期:1988-12-01 00:00:00
abstract:OBJECTIVE:Our aim was to determine whether there was a cerclage height threshold associated with spontaneous preterm birth in patients with an ultrasound-indicated cerclage. STUDY DESIGN:We performed a retrospective cohort study of women with an ultrasound-indicated cerclage. Functional cervical length and the cerclag...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/j.ajog.2008.09.021
更新日期:2009-05-01 00:00:00
abstract::The role of fetal prolactin (PRL) as a fetal adrenotropic hormone was investigated in eight chronically catheterized fetal lambs. Catheters were placed for measurement of plasma prolactin (PRL), cortisol (F), dehydroepiandrosterone (DHEA), dehydroepiandrosterone sulfate (DHEA-S), and androstenedione (A). Daily (9 AM) ...
journal_title:American journal of obstetrics and gynecology
pub_type: 杂志文章
doi:10.1016/0002-9378(81)90320-3
更新日期:1981-02-15 00:00:00