title: Intermittent fetal bradycardia induced by midpregnancy fetal ultrasonographic study.
abstract: Fetal bradycardias were observed during fetal ultrasonographic and echocardiographic studies performed in the second trimester of pregnancy. The episodes of bradycardia were brief and recovery was usually rapid. Ultrasound transducer pressure applied to the maternal abdomen during the study provoked the phenomenon. Vagal discharge resulting from an increase in intrauterine pressure appeared to be the causative mechanism.
authors.affiliation: Department of Pediatrics, Mount Sinai School of Medicine, City University of New York, NY.
authors.forename: G J
authors.initials: GJ
authors.lastname: Mendoza
authors.forename: O
authors.initials: O
authors.lastname: Almeida
authors.forename: L
authors.initials: L
authors.lastname: Steinfeld
mesh_terms: D001919:Bradycardia / Q000175:diagnosis / Q000209:etiology*; D004452:Echocardiography / Q000009:adverse effects* / Q000379:methods; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis / Q000209:etiology*; D005323:Fetal Monitoring / Q000009:adverse effects* / Q000379:methods; D006340:Heart Rate, Fetal; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis / Q000009:adverse effects*; D014463:Ultrasonography / Q000009:adverse effects*