Uncomplicated Fetal Tachycardia in Labour: Dilemmas and Uncertainties Fetal Tachycardia (FT) is described as increase in baseline fetal heart rate (FHR) above 160bpm. Mild fetal tachycardia is described as 161-180bpm and severe tachycardia is defined as greater than 180bpm for at least three minutes. The fetal tachycardia causes include maternal fever, dehydration or anxiety, maternal … Continue reading