Intrapartum Abnormal Fetal HR Tracing - Causes of Bradycardia and Tachycardia - Differential Diagnosis Algorithm Maternal Bradycardia: • Hypotension • Drug response • Maternal position • Connective tissue disease with congenital heart block (e.g. SLE) Fetal Bradycardia: • Umbilical cord occlusion • Fetal hypoxia/acidosis • Vagal stimulation (e.g. chronic head compression) • Fetal cardiac conduction or structural defect Maternal Tachycardia: • Fever • Infection • Dehydration • Hyperthyroidism • Endogenous adrenaline or anxiety • Drug response • Anemia Fetal Tachycardia: • Infection • Prolonged fetal activity or stimulation • Chronic hypoxemia • Cardiac abnormalities • Congenital anomalies • Anemia #Bradycardia #Tachycardia #FetalHR #FetalHeartRate #Tracing #Differential #Diagnosis #Algorithm #Causes #Obstetrics #OBGyn
