Abstract：
OBJECTIVE:Our objective was to study the effect of estrogen administration and moderate hypertension on left ventricular size, pump function, and contractility in chronically instrumented ewes. STUDY DESIGN:Ewes were either given 0.06 mg/kg 17beta-estradiol intramuscularly (n = 8) or were made hypertensive (n = 6) by inflation of an occluder around the aorta and were studied weekly. After 3 weeks each ewe received the opposite treatment. RESULTS:Estrogen administration caused an increase in left ventricular chamber size at a given pressure, fractional shortening (21.9% +/- 2.9% to 28.5% +/- 3.7%), and stroke volume (1.4 +/- 0.3 mL/kg to 1.6 +/- 0.3 mL/kg). Subsequent hypertension further increased left ventricular size at a given pressure but decreased fractional shortening (20.0% +/- 4.4%) and stroke volume (1.3 +/- 0.3 mL/kg). With hypertension first, there was no left ventricular enlargement, even with subsequent estrogen administration, and there were no changes in left ventricular pump function. End-systolic pressure and stress-dimension relationships did not change with either treatment. The end-systolic wall stress-fractional shortening relationship was likewise unchanged, suggesting that neither treatment changed contractility. CONCLUSIONS:The left ventricle previously exposed to hypertension does not remodel when exposed to estrogen, and cardiac pump function decreases when the estrogen enlarged heart is faced with moderate, subacute hypertension.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Jacobson SL,Eicher A,Paul MS,Giraud GD,Morton MJ,Thornburg KLdoi
10.1016/s0002-9378(98)70053-5subject
Has Abstractpub_date
1998-09-01 00:00:00pages
610-9issue
3 Pt 1eissn
0002-9378issn
1097-6868pii
S0002937898700535journal_volume
179pub_type
杂志文章abstract：OBJECTIVE:Oxidative stress occurs when the production of damaging free radicals and other oxidative molecules exceeds the capacity of the body's antioxidant defenses. Oxidative stress is implicated in diseases that are associated with prematurity (such as retinopathy, cerebral palsy, intraventricular hemorrhage, and ne...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2003.357
更新日期：2003-07-01 00:00:00
abstract：OBJECTIVES:We aimed to analyze the predictive value of the fetal scalp blood lactate concentration and pH, especially in regard to outcome variables that are strong predictors of impaired long-term outcome. An additional aim was to establish cutoff lactate levels in fetal scalp blood. STUDY DESIGN:We conducted a retro...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(99)70083-9
更新日期：1999-11-01 00:00:00
abstract：:Highly equivocal results, regarding procedures for the prenatal detection of fetal sexls found in the endocervix, are reported in the literature dating from 1971. The far-reaching genetic and obstetric implications of such procedures led us to investigate endocervical smears from 36 patients (taken during all three t...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(16)33486-x
更新日期：1975-05-01 00:00:00
abstract：OBJECTIVE:We sought to relate the frequency of maternal cell contamination in amniotic fluid samples that were submitted to a single laboratory for cytogenetic analysis to the experience and training of the physician who performed the amniocentesis. STUDY DESIGN:We reviewed the database of a single cytogenetics labora...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2005.05.033
更新日期：2006-01-01 00:00:00
abstract：:The mechanical properties of the chorioamniotic membranes have been studied by several investigators over the past 100 years. No relationship between membrane strength, as measured by rupture tension, and premature or non-premature rupture of the membranes has been demonstrable. In the present study, several measures ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(76)90788-2
更新日期：1976-07-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to examine whether longitudinally sampled maternal angiogenic concentrations predict preeclampsia. STUDY DESIGN:Plasma sFlt-1 and placental growth factor (PlGF) concentrations in healthy pregnant women were quantified at 10, 17, 25, and 35 weeks' gestation. Preeclampsia was diag...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2012.08.010
更新日期：2012-11-01 00:00:00
abstract：OBJECTIVE:In a seroepidemiologic study the effects of pregnancy and other factors on humoral response to human papillomavirus type 16 infection were examined. STUDY DESIGN:Multiple serum samples were taken at 3-month intervals for 15 months from 77 pregnant and 85 nonpregnant women. Serologic response to human papillo...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(98)80026-4
更新日期：1998-02-01 00:00:00
abstract：OBJECTIVE:Our aim was to examine the relationship between the levels of cytokines in peritoneal fluid and its embryo toxicity. STUDY DESIGN:The levels of interleukin-1 and tumor necrosis factor were measured in peritoneal fluid from infertile women who did not have endometriosis (n = 21), who had untreated endometrios...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(11)91672-x
更新日期：1992-07-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to test the null hypothesis that the volume of exercise at different times during pregnancy has no effect on fetoplacental growth. STUDY DESIGN:Seventy-five women who exercised regularly were evaluated before pregnancy and randomly assigned at 8 weeks' gestation to one of 3 exer...
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：10.1067/mob.2002.119109
更新日期：2002-01-01 00:00:00
abstract：OBJECTIVES:Our purpose was to evaluate the anatomic pathology of severe incontinence after fistula closure and assess a surgical technique for correction of this problem. STUDY DESIGN:Twenty-two women with severe urinary incontinence after fistula closure were recruited, and clinical and urodynamic assessment was perf...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2002.122247
更新日期：2002-05-01 00:00:00
abstract：:Congenital chylothorax is an uncommon condition, resulting from lymphatic accumulation in the fetal thorax; affected siblings are extremely rare. We report a woman who delivered 3 children with congenital chylothorax; each case was managed differently, including the use of ex utero intrapartum treatment (EXIT) with th...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2004.09.012
更新日期：2005-06-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to evaluate the effect of prophylactic vaginal progesterone in decreasing preterm birth rate in a high-risk population. STUDY DESIGN:A randomized, double-blind, placebo-controlled study included 142 high-risk singleton pregnancies. Progesterone (100 mg) or placebo was administer...
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：10.1067/mob.2003.41
更新日期：2003-02-01 00:00:00
abstract：:Metformin is everywhere. Originally introduced in clinical practice as an antidiabetic agent, its role as a therapeutic agent is expanding to include treatment of prediabetes mellitus, gestational diabetes mellitus, and polycystic ovarian disease; more recently, experimental studies and observations in randomized clin...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/j.ajog.2017.06.003
更新日期：2017-09-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to determine the prevalence of burnout in chairs of academic departments of obstetrics and gynecology, identify important stressors, and develop strategies to treat and prevent burnout. STUDY DESIGN:We performed a cross-sectional study of 131 chairs in the United States and Puer...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2002.122391
更新日期：2002-04-01 00:00:00
abstract：OBJECTIVE:The studies presented in this report were undertaken to evaluate whether Fusobacterium nucleatum, a common anaerobic isolate in intrauterine infection, stimulates arachidonic acid metabolism, a rate-limiting step for prostaglandin synthesis, in the human uterine endometrium. STUDY DESIGN:Effects of F nucleat...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(98)70028-6
更新日期：1998-12-01 00:00:00
abstract：:Capillary hydrostatic pressure has been calculated in normal pregnancy and preeclampsia. In humans, capillary hydrostatic pressure cannot be measured directly but may be calculated when the colloid osmotic pressure in plasma and interstitial fluid and interstitial fluid hydrostatic pressure are known (Starling equatio...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(87)80355-1
更新日期：1987-07-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to provide evidenced-based guidance for surgical decisions during cesarean delivery. STUDY DESIGN:We performed MEDLINE, PubMed, EMBASE, and COCHRANE searches with the terms cesarean section, cesarean delivery, cesarean, pregnancy, randomized trials, and each technical aspect of ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/j.ajog.2005.03.063
更新日期：2005-11-01 00:00:00
abstract：OBJECTIVE:To determine the impact of maternal and fetal single nucleotide polymorphisms in key betamethasone pathways on neonatal outcomes. STUDY DESIGN:DNA was obtained from women given betamethasone and their infants. Samples were genotyped for 73 exploratory drug metabolism and glucocorticoid pathway single nucleot...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2012.02.016
更新日期：2012-05-01 00:00:00
abstract：:To assess uterine activity before labor in patients delivering preterm, at term, and postterm, the maximum spontaneous contraction frequency per 10-minute window during the initial portion of antepartum fetal heart rate monitoring was analyzed. Patients with multiple gestation, third trimester bleeding, polyhydramnios...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(88)90353-5
更新日期：1988-06-01 00:00:00
abstract：:Congenital cytomegalovirus (CMV) is the most common viral infection, affecting nearly 40,000 infants each year in the United States. Of seronegative women, 1-4% will acquire a primary infection during pregnancy, and the majority of these women will be asymptomatic. Prior maternal exposure to CMV does not preclude neon...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/j.ajog.2016.02.042
更新日期：2016-06-01 00:00:00
abstract：OBJECTIVES:Our purpose was to determine whether blockade of inducible or endothelial nitric oxide synthesis prevents maternal vasodilation and blunting of angiotensin II responsiveness in the pregnant rat. STUDY DESIGN:Pregnant and nonpregnant rats were given (1) drinking water alone (untreated), (2) drinking water co...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(97)70404-6
更新日期：1997-05-01 00:00:00
abstract：:Placental steroid sulfatase deficiency is an unusual cause of low estriol production during pregnancy. Its importance lies in the differentiation of this disorder from the more ominous fetal defects that result in low estriol levels. Serum free estriol levels were found to be low or absent in a 25-year-old gravida 3, ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(76)90526-3
更新日期：1976-11-15 00:00:00
abstract：:The possibility of controlling fertility by antibodies inactivating key reproductive hormones has been amply demonstrated by active and passive immunization in primates. Four birth control vaccines directed against human chorionic gonadotropin are currently in early clinical trials. The nature of these vaccines and th...
journal_title：American journal of obstetrics and gynecology
pub_type： 临床试验,杂志文章
doi：10.1016/s0002-9378(87)80135-7
更新日期：1987-10-01 00:00:00
abstract：OBJECTIVE:Closure of a low transverse cesarean incision with one layer of suture results in less operating time, better hemostasis, and less infectious morbidity than a two-layer closure. STUDY DESIGN:At our institution 906 women were randomized to closure of a low transverse cesarean incision with either one continuo...
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/s0002-9378(12)80048-2
更新日期：1992-10-01 00:00:00
abstract：OBJECTIVE:The study's objective was to provide an introduction to the role of corticotropin-releasing hormone in preterm delivery associated with stress. STUDY DESIGN:A selective review of the current literature relevant to the objective was undertaken. Published data were analyzed for relevance to the biochemical mod...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/s0002-9378(99)70713-1
更新日期：1999-01-01 00:00:00
abstract：:In a previous study, it was suggested that the presence of a grade III placenta correlates 100% with a mature lecithin/sphingomyelin (L/S) ratio and may replace amniocentesis in confirming fetal lung maturity. In this study that hypothesis was tested in 563 pregnancies. All patients underwent amniocentesis and simulta...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(82)90478-1
更新日期：1982-08-15 00:00:00
abstract：:In 1970 Morgan described an operation designed to meet the problem created by scarring and fibrosis resulting from previous operative procedures to the urethra and bladder neck. In the method, a 2 cm wide polypropylene (Marlex) mesh is placed as a broad hammock to elevate and support the urethrovesical junction with l...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(79)90681-1
更新日期：1979-02-01 00:00:00
abstract：:The specific purposes of this report are twofold: (1) to summarize the descriptive epidemiology of urethral-vesical dysfunction in a population of 1439 female patients referred for urodynamic evaluation of symptoms and (2) to analyze the association between demographic, clinical, and investigative data. On the basis o...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(85)90016-x
更新日期：1985-01-15 00:00:00
abstract：OBJECTIVE:We assessed intraobserver and interobserver variations in the performance of the amniotic fluid index. STUDY DESIGN:A total of 34 women in the third trimester with intact membranes were examined twice by each of three examiners. The amniotic fluid index was measured once by each of the three examiners in ord...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(93)90386-w
更新日期：1993-04-01 00:00:00
abstract：OBJECTIVE:This study explores decisional processes regarding termination of pregnancy because of Down syndrome and aims to identify possibilities for improving counseling. STUDY DESIGN:Seventy-one women completed questionnaires 4 months after termination of pregnancy for Down syndrome, including motivations for the de...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2006.09.013
更新日期：2007-02-01 00:00:00
