Prophylactic norepinephrine or phenylephrine infusion for bradycardia and post-spinal anaesthesia hypotension in patients with preeclampsia during Caesarean delivery: a randomised controlled trial

Editor—Preeclampsia is characterised by pregnancy-induced hypertension, affects 2–8% of pregnancies, and is associated with significant morbidity and mortality in patients and neonates.1 As spinal anaesthesia can improve intervillous blood flow, decrease maternal plasma catecholamines, and help control blood pressure,2 it remains the preferred mode of anaesthesia for patients with preeclampsia during Caesarean delivery.3 However, sympathetic block after spinal anaesthesia contributes to post-spinal anaesthesia hypotension.