title: The mechanical PR interval in fetuses of women with intrahepatic cholestasis of pregnancy.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the fetal mechanical PR interval in intrahepatic cholestasis of pregnancy (ICP).
  
  
  METHODS
  Fetal echocardiography was performed for women with ICP and control subjects. Clinical characteristics, total bile acids, and liver profile tests were compared between groups.
  
  
  RESULTS
  Fourteen women with ICP and 7 control subjects were enrolled. Total bile acids (28.3 vs 6.2 μmol/L; P < .001), aspartate aminotransferase (53 vs 23 IU/L; P = .002), alanine aminotransferase (63 vs 19 IU/L; P = .002), and the PR interval (124 vs 110 msec; P = .006) were significantly higher in fetuses with ICP than in control fetuses. On multivariable linear regression analysis, only the presence of ICP was associated significantly with an increase in the PR interval (95% confidence interval, 4-24 msec; P = .01).
  
  
  CONCLUSIONS
  The fetal cardiac conduction system is altered in ICP. Further investigation is needed to determine whether fetal echocardiography can help to predict which fetuses are at risk for death that is associated with ICP.
authors.affiliation: Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, LAC+USC Medical Center, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
authors.forename: Stacy L
authors.initials: SL
authors.lastname: Strehlow
authors.forename: Bhuvan
authors.initials: B
authors.lastname: Pathak
authors.forename: Thomas M
authors.initials: TM
authors.lastname: Goodwin
authors.forename: Belinda M
authors.initials: BM
authors.lastname: Perez
authors.forename: Mahmood
authors.initials: M
authors.lastname: Ebrahimi
authors.forename: Richard H
authors.initials: RH
authors.lastname: Lee
mesh_terms: D000328:Adult; D002780:Cholestasis, Intrahepatic / Q000000981:diagnostic imaging*; D005260:Female; D006329:Heart Conduction System / Q000000981:diagnostic imaging*; D006801:Humans; D016014:Linear Models; D011247:Pregnancy; D011248:Pregnancy Complications / Q000000981:diagnostic imaging*; D016216:Ultrasonography, Prenatal