Abstract:
:The many physiological and hormonal changes occurring during pregnancy have the potential to affect a woman's cardiovascular responses to aerobic exercise. For example, it seems that increased mass and dilation of the left ventricle allow maintenance of wall stress, ensuring adequate pumping function throughout gestation. Also, a woman's cardiac output response to exercise is typically increased during pregnancy, owing to alterations in both heart rate and stroke volume. However, mean arterial pressure response is not usually affected by pregnancy because the increased blood flow to the uteroplacental unit, skin, and kidneys results in a concomitant decrease in systemic vascular resistance. It should be noted that there is no clear agreement on the mechanisms behind hemodynamic responses to exercise throughout gestation. Indeed, a pregnant woman's cardiac output during physical activity may be affected by (1) gestational age, (2) body position, (3) exercise intensity and modality, and (4) fitness level.
journal_name
Semin Perinatoljournal_title
Seminars in perinatologyauthors
Pivarnik JMdoi
10.1016/s0146-0005(96)80017-6subject
Has Abstractpub_date
1996-08-01 00:00:00pages
242-9issue
4eissn
0146-0005issn
1558-075Xpii
S0146-0005(96)80017-6journal_volume
20pub_type
杂志文章,评审abstract::This article reviews the literature on infectious diseases as a cause of stillbirth. Identifying a specific infection as a cause of stillbirth is limited by many obstacles. Nevertheless, "good faith" efforts estimate that approximately 9% to 15% of stillbirths are caused by infections. Infection may be especially impo...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/sper.2002.29839
更新日期:2002-02-01 00:00:00
abstract::Sleep-disordered breathing occurs in 0.6-15% of reproductive age women. This condition is associated with an increased lifetime risk of cardiovascular disease, cardiovascular mortality, and all-cause mortality. A substantial body of evidence demonstrated increased perinatal morbidity among pregnancies affected by SDB ...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/j.semperi.2015.05.010
更新日期:2015-06-01 00:00:00
abstract::Venous thromboembolism (VTE) is a leading cause of severe maternal morbidity and mortality. While pregnancy alone is a risk factor for VTE, additional population-based risk factors such as obesity are becoming increasingly common, particularly in the developed world. Maternal death from VTE is amenable to prevention a...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/j.semperi.2015.11.011
更新日期:2016-03-01 00:00:00
abstract::Given the historically high rates of cesarean delivery in the United States, obstetrical providers must often consider an induction of labor for women with a history of prior cesarean delivery versus repeat cesarean delivery. Clinical evaluation of this scenario involves weighing the benefits of a successful trial of ...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/j.semperi.2015.07.011
更新日期:2015-10-01 00:00:00
abstract::Postpartum hemorrhage is the leading cause of maternal morbidity and mortality worldwide. The majority of maternal deaths associated with hemorrhage could be preventable. The accurate assessment of blood loss, identification of risk factors and timely recognition of postpartum hemorrhage remain major challenges in obs...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/j.semperi.2018.11.003
更新日期:2019-02-01 00:00:00
abstract::Medium- and long-term outcomes have been collected and described among survivors of neonatal intensive care units for decades, for a number of purposes: (1) quality control within units, (2) comparisons of outcomes between NICUs, (3) clinical trials (whether an intervention improves outcomes), (4) end-of-life decision...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/j.semperi.2016.09.009
更新日期:2016-12-01 00:00:00
abstract::The rapid rise of novel coronavirus disease 2019 (COVID-19) cases led the American Society for Reproductive Medicine (ASRM) to recommend immediate cessation of all new fertility treatment cycles on March 17, 2020. Controversial from the start, providers and patients expressed their opposition through online petitions,...
journal_title:Seminars in perinatology
pub_type: 杂志文章
doi:10.1016/j.semperi.2020.151288
更新日期:2020-11-01 00:00:00
abstract::Health care simulation is a powerful educational tool to help facilitate learning for clinicians and change their practice to improve patient outcomes and safety. To promote effective life-long learning through simulation, the educator needs to consider individuals, their experiences, and their environments. Effective...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/j.semperi.2011.01.002
更新日期:2011-04-01 00:00:00
abstract::Minimally invasive surgery has been one of the most important surgical advances in the last 15 years. The development of smaller instruments has allowed pediatric surgeons to apply this rapidly evolving technology to neonates. Congenital neonatal deformities including tracheoesophageal fistula, patent ductus arteriosu...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/j.semperi.2004.03.008
更新日期:2004-06-01 00:00:00
abstract::We have hypothesized that an alteration in the production of endothelium-dependent factors by sex hormones is a potential unifying mechanism for both the decreased arterial contractility and the redistribution of cardiac output characteristic of normal pregnancy. Thus, the effect of pregnancy/ estradiol on any one vas...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1016/s0146-0005(97)80003-1
更新日期:1997-10-01 00:00:00
abstract::Acute renal failure in the newborn is a common problem and is typically classified as prerenal, intrinsic renal disease including vascular insults, and obstructive uropathy. In the newborn, renal failure may have a prenatal onset in congenital diseases such as renal dysplasia with or without obstructive uropathy and i...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/j.semperi.2003.11.003
更新日期:2004-04-01 00:00:00
abstract::Before sounds originating outside the abdomen of pregnant women can reach the inner ear of the fetus, they must first pass through the tissues and fluids surrounding the fetal head. Low-frequency sound energy easily penetrates to the fetal head, less than 5 dB attenuation for frequencies below 500 Hz, whereas higher f...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1016/s0146-0005(96)80053-x
更新日期:1996-02-01 00:00:00
abstract::Effective training has been shown to improve perinatal care and outcome, decrease litigation claims and reduce midwifery sick leave. To be effective, training should be incentivised, in a realistic context, and delivered to inter-professional teams similar to those delivering actual care. Teamwork training is a useful...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/j.semperi.2013.02.005
更新日期:2013-06-01 00:00:00
abstract::Intrauterine growth restriction (IUGR), which complicates approximately 3% to 10% of all pregnancies leads to preferential hemodynamic changes in affected fetuses. Advanced ultrasound modalities allow reliable and reproducible assessment of the intrauterine fetal cardiac function. Among other methods, combined cardiac...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/j.semperi.2008.02.010
更新日期:2008-06-01 00:00:00
abstract::Long-term sequelae of preterm birth have been studied extensively up until the age of 5 to 8 years. However, the cognitive development of adolescents born preterm has received limited attention. The objective of this study is to determine school performance in adolescents born very preterm. We have followed up a cohor...
journal_title:Seminars in perinatology
pub_type: 杂志文章
doi:10.1053/j.semperi.2004.08.007
更新日期:2004-08-01 00:00:00
abstract::Nutrition plays a critical role in the prevention and management of bronchopulmonary dysplasia (BPD). Growth failure in infants with BPD is predominantly due to malnutrition. Malnutrition can worsen BPD by compromising lung growth. Feeding difficulties in these infants can further affect nutrition. Dexamethasone, used...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/j.semperi.2006.05.007
更新日期:2006-08-01 00:00:00
abstract::The neurodevelopmental outcome of very low birth weight infants experiencing early-onset intraventricular hemorrhage (IVH) occurring within the first 6 postnatal hours was compared with that of their peers without early-onset IVH at 3 years corrected age. The 440 surviving preterm infants (birth weight 600 to 1,250 g)...
journal_title:Seminars in perinatology
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1016/s0146-0005(99)80065-2
更新日期:1999-06-01 00:00:00
abstract::Many perinatal pathogens are able to survive and in some cases replicate intracellularly. With the exception of viruses and toxoplasma, these pathogens principally infect phagocytic cells of the reticuloendothelial system. Such intracellular organisms, by evading the effects of antibiotics that act only extracellularl...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:
更新日期:1982-04-01 00:00:00
abstract::The renin angiotensin system (RAS) is now recognized as the body's most powerful hormone system for controlling renal hemodynamics and sodium excretion and, therefore, body fluid volumes and arterial pressure. The discovery of angiotensin converting enzyme inhibitors (ACEi) was a keystone for the understanding of the ...
journal_title:Seminars in perinatology
pub_type: 历史文章,杂志文章
doi:10.1016/s0146-0005(00)80046-4
更新日期:2000-02-01 00:00:00
abstract::Neonatal hyperbilirubinemia is a normal postnatal phenomenon resulting from a transitional imbalance between the production and elimination of bilirubin in the neonate. Bilirubin has been shown to be not only a potent antioxidant, but also toxic at excessive concentrations. As a result, the biology of bilirubin, its p...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/sper.2001.23197
更新日期:2001-04-01 00:00:00
abstract::The highly contagious severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has affected every aspect of medical practice and has all but ceased clinical, translational and basic science research. Pregnant women appear to be similarly affected by the virus as non-pregnant adults. As obstetricians, not only do w...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1016/j.semperi.2020.151287
更新日期:2020-11-01 00:00:00
abstract::Prostaglandins are currently used to maintain patency of the ductus arteriosus and to elicit uterine contractions. Prostaglandin synthesis inhibitors are used to promote closure of the ductus and their administration in pregnant animals has produced fetal pulmonary hypertension. Exposure of the human fetus to inhibito...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:
更新日期:1987-01-01 00:00:00
abstract::In this article, we have reviewed the most common CNS abnormalities seen in perinatal medicine. The prognosis in ventriculomegaly is most closely related to the presence or absence of associated anomalies. The current treatment for DWM consists of shunting of either the posterior fossa cyst or lateral ventricles. Faci...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:
更新日期:1994-08-01 00:00:00
abstract::The words research and experimentation continue to have the power to evoke fear in potential subjects. But much of standard practice, particularly in critical care settings, involves interventions of unknown efficacy and safety. Innovation also abounds in practice settings, typically unchecked by prospective or retros...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1016/s0146-0005(98)80038-4
更新日期:1998-06-01 00:00:00
abstract::Experience gathered over the last decade from high-risk centers provide strong evidence that mid-trimester sonographic markers are sensitive for Down syndrome prediction. More recent data indicate that combining mid trimester sonography with traditional serum markers significantly improves diagnostic accuracy over eit...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/sper.2003.50013
更新日期:2003-04-01 00:00:00
abstract::Unpublished results can bias biomedical literature, favoring positive over negative findings, primary over secondary analyses, and can lead to duplicate studies that unnecessarily endanger subjects and waste resources. The Neonatal Research Network's (NRN) publication policies for approving, reviewing, and tracking ab...
journal_title:Seminars in perinatology
pub_type: 杂志文章
doi:10.1053/j.semperi.2016.05.003
更新日期:2016-10-01 00:00:00
abstract::Infant mortality, fetal mortality, and preterm birth all represent important health challenges that have shown little recent improvement. The rate of decrease in both fetal and infant mortality has slowed in recent years, with little decrease since 2000 for infant mortality, and no significant decrease from 2003 to 20...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/j.semperi.2011.02.017
更新日期:2011-08-01 00:00:00
abstract::Preterm births account for a substantial portion of infant mortality, the major difference in mortality between African-American and white births in the United States, and the key reason that US infant mortality exceeds that of other developed nations. Although preterm birth rates are higher in the African-American co...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1016/s0146-0005(05)80039-4
更新日期:1995-08-01 00:00:00
abstract::Use of immunosuppressants during pregnancy is indicated for anti-rejection therapy in transplantation patients and treatment of autoimmune diseases. Maternal side effects include nephrotoxocity and hepatotoxicity. All immunosuppressant drugs cross the placenta. Immunosuppressant use during the first trimester is not s...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1016/s0146-0005(97)80057-2
更新日期:1997-04-01 00:00:00
abstract::The primary methods currently in use for imaging the infant brain are cranial ultrasound (CUS), computed tomography (CT) and magnetic resonance imaging (MRI). This review outlines the relative strengths and weaknesses of these modalities in relation to the premature infant, with specific focus on the correlations betw...
journal_title:Seminars in perinatology
pub_type: 杂志文章,评审
doi:10.1053/j.semperi.2004.10.004
更新日期:2004-12-01 00:00:00