Abstract：
:Right and left ventricular outputs were measured continuously in fetal lambs in utero for 2 to 21 days after implantation of electromagnetic flow tranducers around the main pulmonary trunk and ascending aorta. Surface pacing electrodes were implanted on the left and right atria. The intact cervical vagus nerve was stimulated by electrodes implanted around the nerve. Spontaneous increased in fetal heart rate were associated with increases in both right and left ventricular outputs and spontaneous falls in heart rate with reduction in both outputs. There was a linear relationship between fetal heart rate and ventricular outputs. Vagal stimulation reduced fetal heart rate with a consistent and linear fall in ventricular output. Left atrial pacing increased right ventricular output by 15 to 20 per cent but produced a variable response, ususally a fall, in left ventricular output. Right atrial pacing resulted in increases in both outputs but the increase in right ventricular output was less than during left atrial pacing at the same rate. The difference in response of ventricular outputs to induced as compared to spontaneous heart rate changes relates to the effects on left and right atrial phasic pressure relationships. These changes probably alter blood flow patterns across the foramen ovale.
journal_name
Am J Obstet Gynecoljournal_title
American journal of obstetrics and gynecologyauthors
Rudolph AM,Heymann MAdoi
10.1016/s0002-9378(16)33296-3subject
Has Abstractpub_date
1976-01-15 00:00:00pages
183-92issue
2eissn
0002-9378issn
1097-6868pii
S0002-9378(16)33296-3journal_volume
124pub_type
杂志文章abstract：OBJECTIVE:Several studies have shown that abnormal intrapartum fetal heart rate patterns are the results from pre-existing fetal brain damage. We evaluated intrapartum fetal heart rate pattern of cytomegalovirus-infected fetuses and correlated the patterns with neurologic outcomes. STUDY DESIGN:Between 1991 and 2001, ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2004.03.015
更新日期：2004-10-01 00:00:00
abstract：:Responses of the component tissues of the nonpregnant ovine uterus to intravenous administration of norepinephrine were determined with radioactively labeled microspheres under flowmeter guidance. During a mean decrease in uterine conductance to 42 per cent of control, no significant differences in the distribution of...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：
更新日期：1978-08-01 00:00:00
abstract：:Serum prolactin was measured simultaneously by a homologous radioimmunoassay in 92 parturients and their offspring at term, and in maternal serum and amniotic fluid during various stages of normal pregnancy. Serum levels of 208 +/- 8 ng. per millilter were found in maternal blood; the corresponding levels in the cord ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(75)90858-3
更新日期：1975-12-15 00:00:00
abstract：OBJECTIVE:Our purpose was to determine whether red blood cells from patients with severe preeclampsia may exhibit increased membrane exposure of procoagulant phospholipids (i.e., phosphatidylserine), which may initiate intravascular clotting and platelet activation. STUDY DESIGN:The study group comprised 28 women: 9 w...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(97)70100-5
更新日期：1997-12-01 00:00:00
abstract：:Reanalysis of data on the ovulation method of natural family planning collected by the World Health Organization yields the following conclusions. The method is effective during perfect (correct and consistent) use, with a first-year probability of failure of 3.4%. However, it is extremely unforgiving of imperfect use...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(11)90581-x
更新日期：1991-12-01 00:00:00
abstract：:Amide-linked local anesthetic agents, such as lidocaine and bupivacaine, can become "trapped" in their ionized forms on the fetal side of the placenta, and therefore their net transfer across the placenta is increased. An ester-linked local anesthetic agent, 2-chloroprocaine, is rapidly metabolized, and placental tran...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(85)90295-9
更新日期：1985-02-01 00:00:00
abstract：:Maternal heart rate (MHR), blood pressure (BP), the differential index (DI) describing the short-term component of fetal heart rate (FHR) variability, and the interval index (II) describing the long-term component were measured in eight subjects in the midtrimester before, during, and after the mothers smoked a standa...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(83)91013-x
更新日期：1983-07-15 00:00:00
abstract：:Correlation between Goodwin's high-risk score and Apgar score was studied in 266 pregnancies managed with the use of the information from clinical monitoring. The correlation coefficients between Goodwin's score and Apgar scores were -0.3178 for one-minute Apgar scores and -0.2668 for five-minute Apgar scores. Both ar...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(77)90313-1
更新日期：1977-01-01 00:00:00
abstract：OBJECTIVE:This study was undertaken to assess the utility of the Advanced Life Support in Obstetrics Course for obstetrics/gynecology first-year residents by triangulating pretest and posttest scores on written test of knowledge by interns, with qualitative surveys by residents, and faculty. STUDY DESIGN:Obstetrics/gy...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2006.10.912
更新日期：2007-05-01 00:00:00
abstract：:A transvaginal duplex Doppler ultrasonography system was used to measure blood flow characteristics in the ascending uterine artery before and during pregnancy. The system uses a 5 MHz Doppler transducer coupled to a 6.5 MHz imaging probe. There was a steady increase in volume flow rate in the left ascending uterine a...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(90)90834-t
更新日期：1990-01-01 00:00:00
abstract：OBJECTIVE:The aim of this study was to test the hypothesis that severe placental insufficiency and a rise in fetal systemic venous pressure are associated with fetal myocardial cell damage, which in turn leads to increased neonatal troponin T levels. STUDY DESIGN:Sixty-six neonates born after uncomplicated pregnancy a...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2000.106753
更新日期：2000-09-01 00:00:00
abstract：OBJECTIVE:This study was designed to develop formulas using the chest circumference instead of the abdominal circumference for estimating fetal weight. STUDY DESIGN:Ultrasonographic measurements of the chest circumference, biparietal diameter, abdominal circumference, humeral length, and femoral length were obtained i...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(11)91427-6
更新日期：1992-08-01 00:00:00
abstract：:Optimal management of HIV-positive pregnant individuals involves many specific interventions made by many healthcare professionals at specific time-points before, during, and after pregnancy. Errors of omission are likely unless those professionals use a cognitive aid such as a checklist as a reminder of critical step...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2020.08.064
更新日期：2020-11-01 00:00:00
abstract：:Uterine fibroid tumors (leiomyomas) are the most common benign pelvic tumors in women and are the major indication for hysterectomy. Fibroid tumors are more common and more severe among African American women. Although this disease disproportionately affects the African American population, we understand little about ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/j.ajog.2013.08.008
更新日期：2014-03-01 00:00:00
abstract：OBJECTIVE:Our purpose was to determine the effect of perfusate flow or viscosity on release and action of nitric oxide in the human fetal-placental vasculature in vitro. STUDY DESIGN:Cotyledons from normal term placentas were perfused with Hanks' buffered saline solution gassed with 95% oxygen and 5% carbon dioxide, p...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(95)90327-5
更新日期：1995-09-01 00:00:00
abstract：OBJECTIVE:To analyze the effects of preconception maternal height and weight on the risk of preterm singleton and twin births resulting from in vitro fertilization (IVF). STUDY DESIGN:We performed a retrospective cohort analysis of the incidence of very early preterm birth (VEPTB), early preterm birth (EPTB), and pret...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2013.05.052
更新日期：2013-10-01 00:00:00
abstract：OBJECTIVE:We hypothesize that vascular endothelial growth factor, a known angiogenic and permeability factor that is locally expressed in fetal membranes and decidua, may be the primary regulator in the pathway that eventually leads to preterm premature rupture of membranes. Our objective was to test the hypothesis tha...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2002.127145
更新日期：2002-11-01 00:00:00
abstract：BACKGROUND:Most early preterm births are associated with intraamniotic infection and inflammation, which can lead to systemic inflammation in the fetus. The fetal inflammatory response syndrome describes elevations in the fetal interleukin-6 level, which is a marker for inflammation and fetal organ injury. An understan...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2018.01.009
更新日期：2018-04-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to investigate the use of vaginal progesterone for the prevention of preterm delivery in twin pregnancies. STUDY DESIGN:We conducted a prospective, randomized, double-blind, placebo-controlled trial that involved 390 naturally conceived twin pregnancies among mothers with no his...
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.2015.02.021
更新日期：2015-07-01 00:00:00
abstract：:Following infusion of parathyroid extract (PTE), parathyroid hormone (PTH) did not cross the placenta from the monkey mother to her fetus. Although maternal PTH levels increased four- to 12-fold, fetal PTH levels remained at the base line at all times tested. To determine if PTH crossed the placenta from fetus to moth...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(77)90593-2
更新日期：1977-10-15 00:00:00
abstract：OBJECTIVE:Ovarian vein thrombosis is associated with pregnancy and pelvic surgery. Postpartum ovarian vein thrombosis is associated with infection and a high morbidity rate and is treated with anticoagulant and intravenous antibiotic therapy. The natural history of such thrombotic events after debulking surgery for ova...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2015.02.028
更新日期：2015-08-01 00:00:00
abstract：OBJECTIVE:The purpose of this study was to estimate US rates of postpartum intrauterine device (IUD) insertion and postpartum tubal sterilization. STUDY DESIGN:Data from the 2001-2008 Nationwide Inpatient Sample were used to identify delivery hospitalizations with IUD insertion or tubal sterilization procedure codes. ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2011.08.004
更新日期：2012-02-01 00:00:00
abstract：OBJECTIVE:Hemolytic disease of the fetus and newborn infant (HDFN) can be associated with bilirubin encephalopathy, which is usually averted through neonatal exchange transfusions (EXT). However, EXT can be associated with significant procedure-related morbidity. We hypothesized that maternal oral administration of phe...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2004.08.016
更新日期：2005-02-01 00:00:00
abstract：OBJECTIVE:We evaluated whether women with vulvar vestibulitis syndrome (VVS) could be subdivided on the basis of genotyping the polymorphic mannose-binding lectin (MBL) gene. STUDY DESIGN:DNA from 123 women with VVS was tested for a single nucleotide polymorphism at codon 54 of the MBL gene. Blood samples from 86 of t...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2007.05.037
更新日期：2008-01-01 00:00:00
abstract：:Comparisons of two methods of sterilization on 250 patients at Victoria General Hospital, Nova Scotia, Canada between January 1968 and December 1970. There were 85 vaginal procedures and 165 abdominal procedures; 50 cases were lost to follow-up. Average age of the women was 35 years, average parity was 3.5 children....
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(73)90397-9
更新日期：1973-02-15 00:00:00
abstract：OBJECTIVE:Our aim was to determine whether early second-look lysis of adhesions reduces postoperative adhesions. STUDY DESIGN:With the murine uterine horn model, early second-look lysis of adhesions was performed 5, 7, 14, and 21 days after an electrocautery injury. Sites with adhesions (between 36 and 46/time point) ...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/s0002-9378(98)70366-7
更新日期：1998-08-01 00:00:00
abstract：OBJECTIVE:Our objectives were to determine patterns of antenatal Down syndrome screening and risk adjustment by maternal-fetal medicine specialists in the United States in 2001. STUDY DESIGN:A survey to investigate Down syndrome screening practice patterns was mailed to the 1,638 members of the Society of Maternal-Fet...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1067/mob.2002.126980
更新日期：2002-11-01 00:00:00
abstract：OBJECTIVE:Fetal interventions have clearly decreased mortality, but the neurological outcomes of survivors are of critical concern. Here we consolidated available data on long-term neurological outcomes after common fetal interventions to guide counseling, management, and future research. STUDY DESIGN:Published studie...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章,评审
doi：10.1016/j.ajog.2014.10.1092
更新日期：2015-04-01 00:00:00
abstract：OBJECTIVE:The purpose of the present systematic review is to evaluate the available medical treatments for vulvar lichen sclerosus, using an arm-based network meta-analysis protocol. DATA SOURCES:We searched Medline (1966-2019), Scopus (2004-2019), Cochrane Central Register of Controlled Trials CENTRAL (1999-2019), Cl...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/j.ajog.2019.10.095
更新日期：2020-06-01 00:00:00
abstract：:One hundred twenty preterm newborns less than 34 weeks' gestational age have been studied prospectively to determine the frequency of fetal and newborn metabolic acidosis and to examine the relationship of metabolic acidosis to periventricular leukomalacia as demonstrated by serial newborn ultrasonographic examination...
journal_title：American journal of obstetrics and gynecology
pub_type： 杂志文章
doi：10.1016/0002-9378(90)91299-r
更新日期：1990-04-01 00:00:00
