Valores normales de la frecuencia cardíaca fetal

Departamento de Fisiología Obstétrica. Consulta Externa del Servicio de Ginecoobstetricia e Investigación. Hospital General de México. Secretaría de Salud. Sección de Estudios de Posgrado e Investigación. Escuela Superior de Medicina-IPN. Instituto Nacional de Diagnóstico y Referencia Epidemiológica SS. Universidad Autónoma Metropolitana-Unidad Xochimilco. México.
Clínica e Investigación en Ginecología y Obstetricia 01/2003; 30(9). DOI: 10.1016/S0210-573X(03)77276-1

ABSTRACT SUMMARY Normal foetal heart rate (FHR) values were obtai- ned from a sample of patients with no pathology. There were 20 patients with normal laboratory analy- sis. Pregnancy age ranged from 27 to 39 weeks, with a mean and standard deviation of 33.25 #+ 3.11 we- eks. Uterine contractility and FHR registers were made

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    ABSTRACT: The role of nonstressed monitoring of the fetal heart rate (HR) in determining fetal well-being during the antepartum period was assessed in 125 high-risk patients. Observations on HR, variability, and HR response to fetal movement (FM) and uterine contractions (UC) over a 30 minute period were made with an external microphone and tocotransducer. A total of 625 tests were performed; the earliest gestation tested was 28 weeks, and the latest was 46 weeks. A reactive pattern (variability greater than 6 b.p.m. and accelerations with FM) appears to be a reliable indicator of fetal well-being. All the 51 fetuses exhibiting this pattern survived. This group also had the lowest incidence of neonatal complications. On the other hand, of the babies who failed to show variability greater than 6 b.p.m. or accelerations with FM (nonreactive pattern), 40% died in the perinatal period. Thirty-five patients showed features of both a reactive and nonreactive pattern (combined pattern). Poor outcome in this group was confined to those in whom the majority of the pattern was nonreactive. An undulating HR pattern with virtually absent variability (sinusoidal pattern) was found in 20 Rh-sensitized fetuses, 50% of whom died in the perinatal period. Bradycardia and tachycardia were not found to be reliable signs of fetal distress antepartum. Of the 12 fetuses who died during observation, six showed late decelerations with spontaneous UC but all showed diminished variability. The close correlation between nonstressed patterns and neonatal outcome demonstrated by this preliminary study warrants further use of this technique for fetal evaluation.
    American Journal of Obstetrics and Gynecology 12/1976; 126(6):699-706. · 3.88 Impact Factor
  • American Journal of Obstetrics and Gynecology 06/1959; 77(5):1084-99. · 3.88 Impact Factor
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    ABSTRACT: SummaryA classification of fetal heart rate (FHR) responses to fetal movements is based on the study of 210 hours of antepartum cardiotocographic tracings in clinically normal pregnant patients between 30 and 42 weeks gestation. The physiological mechanisms underlying the FHR responses to fetal movement are discussed.
    BJOG An International Journal of Obstetrics & Gynaecology 06/1977; 84(7):487 - 491. · 3.76 Impact Factor


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