Management of Postpartum Preeclampsia with Severe Features

Clinical Presentation and Diagnosis

The American College of Cardiology and other guideline societies recommend that patients with preeclampsia and severe features, such as headache, visual disturbances, and hypertension, require immediate magnesium sulfate for seizure prophylaxis and labetalol for blood pressure control 1, 2, 3
The presence of headache and visual disturbances in a postpartum patient indicates severe preeclampsia with imminent risk of eclamptic seizures, as reported by the European Society of Cardiology 1, 2
A blood pressure of 140/100 mmHg in a previously normotensive woman can cause significant symptomatology and requires treatment, according to the American Heart Association 1

The European Society of Cardiology recommends magnesium sulfate as the definitive agent for seizure prophylaxis in preeclampsia, which must be initiated immediately 3, 4
Standard dosing of magnesium sulfate, as used in the MAGPIE trial, should be used: a loading dose followed by a maintenance infusion 4
Labetalol is the first-line antihypertensive agent for postpartum preeclampsia with severe features, and should be initiated immediately at 200 mg three times daily, as recommended by the American College of Obstetricians and Gynecologists 3, 1, 5
If blood pressure rises to ≥160/110 mmHg, IV labetalol is required: 20 mg IV bolus, then 40 mg after 10 minutes, then 80 mg every 10 minutes to a maximum of 220-300 mg, according to the European Heart Journal 3, 1, 5

Blood pressure should be monitored every 4-6 hours for at least 3 days, and continuously during magnesium infusion for signs of toxicity, as recommended by the American Society of Hypertension 4
Neurological status should be assessed for worsening headache, visual changes, or altered mental status, according to the European Society of Cardiology 4
Laboratory monitoring, including hemoglobin, platelets, creatinine, and liver transaminases, should be repeated daily until stable, as reported by the American College of Cardiology 4
Hospitalization is mandatory for close monitoring with adequate maternal intensive care resources, and follow-up within 1 week is recommended if still requiring antihypertensives at discharge, according to the American Heart Association 3, 4