Emergency Management of Severe Hypertension in Pregnancy

Initial Management

A blood pressure of 280/192 mmHg represents a hypertensive emergency requiring immediate hospitalization, according to the European Society of Cardiology 1

The European Society of Cardiology recommends first-line intravenous antihypertensive options, including Labetalol IV and Hydralazine IV, for the treatment of severe hypertension in pregnancy 2
Labetalol IV can be administered with an initial 20 mg bolus, then 40 mg if needed after 10 minutes, followed by 80 mg every 10 minutes to a maximum of 220 mg, as recommended by the American Heart Association 3
Hydralazine IV can be administered with a 5 mg bolus, then 10 mg every 20-30 minutes to a maximum of 25 mg, as recommended by the American Heart Association 3
Nifedipine can be used as an oral option if IV access is unavailable, with a dose of 10 mg orally, which can be repeated every 20 minutes to a maximum of 30 mg, as recommended by the American Heart Association 3

ACE inhibitors, ARBs, and direct renin inhibitors are absolutely contraindicated throughout pregnancy due to fetotoxicity, according to the American Heart Association 4 and the American College of Cardiology 5

Methyldopa is a first-line oral agent with the longest safety record for the treatment of hypertension in pregnancy, as recommended by the European Society of Cardiology 1 and the American Heart Association 5
Labetalol is an effective alternative with a good safety profile for the treatment of hypertension in pregnancy, as recommended by the American Heart Association 5

The European Society of Cardiology recommends determining if the severe hypertension represents pre-existing hypertension with superimposed preeclampsia or gestational hypertension with severe features 1
Laboratory evaluation should include liver function tests, as recommended by the European Society of Cardiology 2
Laboratory evaluation should include renal function tests, as recommended by the American Heart Association 3
Laboratory evaluation should include urinalysis for proteinuria, as recommended by the European Society of Cardiology 2
Laboratory evaluation should include coagulation studies, as recommended by the European Society of Cardiology 2

Urgent delivery may be necessary regardless of gestational age in cases of severe hypertension, as recommended by the European Society of Cardiology 1
Magnesium sulfate should be administered for seizure prophylaxis if preeclampsia is diagnosed, as recommended by the American Heart Association 3
If pulmonary edema develops, nitroglycerin is the preferred agent, as recommended by the European Society of Cardiology 2