Possible causes of baseline bradycardia
Late fetal hypoxemia
Adrenergic blocking drugs such as propanolol
Prolonged umbilical cord compression
Maternal hypotension
Maternal hypothermia
Prolonged Maternal hypoglycaemia
Possible causes of baseline tachycardia
Early fetal hypoxemia
parasympatholytic drugs such as atropine
sympatho mimetic drugs such as ritodrine
chorioamnionitis
Fetal anaemia, heart failure and cardiac dysrhythmia
Maternal fever
Maternal hyperthyroidism
Maternal use of recreational drugs such as cocaine and methamphetamine
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