Management of Hypertension in Pregnancy

Initial Assessment and Classification

The European Society of Cardiology recommends that hypertension in early pregnancy (before 20 weeks) is typically classified as pre-existing hypertension, which complicates 1-5% of pregnancies 1, 4
Severe hypertension (BP 160/100 mmHg) at 6 weeks gestation is concerning for pre-existing hypertension since it occurs before 20 weeks gestation, as stated by the European Heart Journal 1, 2
The presence of headache with scalp tenderness, especially with a history of migraine-like headaches, requires careful evaluation as these may be warning signs of severe hypertension or pre-eclampsia, according to the European Heart Journal 3, 2

The European Society of Cardiology guidelines state that BP ≥160/100 mmHg should be re-evaluated within 15 minutes to confirm the reading 3, 5
If confirmed, this level of BP requires prompt antihypertensive treatment as it represents a hypertensive urgency that increases risk of maternal complications including stroke, as recommended by the European Heart Journal 3, 5
The immediate goal is to decrease mean BP by 15-25% with a target of SBP 140-150 mmHg and DBP 90-100 mmHg, according to the European Heart Journal 3

The European Society of Cardiology recommends labetalol as first-line treatment for severe hypertension in pregnancy and can be given orally or intravenously in urgent situations 3, 4
Oral nifedipine is another appropriate first-line option for urgent BP control in pregnancy, as stated by the European Heart Journal 3, 5
Methyldopa is recommended for long-term management but should not be used primarily for urgent BP reduction, according to the European Heart Journal 5
ACE inhibitors, ARBs, and direct renin inhibitors are strictly contraindicated in pregnancy due to fetotoxicity, as recommended by the European Society of Cardiology 1, 4

Regular monitoring is essential with a target of maintaining BP <140/90 mmHg, as recommended by the European Society of Cardiology 1, 5
Evaluate for proteinuria to rule out early pre-eclampsia, although this is uncommon before 20 weeks, according to the European Heart Journal 1, 2
Monitor for maternal early warning signs including persistent headache, visual disturbances, and changes in mental status, as stated by the European Heart Journal 3

Low-dose aspirin (75-100 mg/day) may be considered as prophylaxis if the patient has risk factors for pre-eclampsia, as recommended by the European Society of Cardiology 4, 6
Non-pharmacological measures include limitation of activities and some bed rest in the left lateral position, according to the European Heart Journal 4
A normal diet without salt restriction is advised to prevent low intravascular volume, as recommended by the European Society of Cardiology 4
Regular prenatal care with close BP monitoring is essential throughout pregnancy, as stated by the European Heart Journal 5

Avoid excessive BP reduction as this may impair uteroplacental perfusion and jeopardize fetal development, as recommended by the European Society of Cardiology 1, 4
Be vigilant for signs of worsening hypertension or development of pre-eclampsia as pregnancy progresses, according to the European Heart Journal 1, 2