Management of Hypertension in Pregnancy

Vasopressors and Blood Pressure Management

The European Society of Cardiology recommends intravenous labetalol as the first-line vasopressor for hypertensive emergencies in pregnancy, with oral methyldopa and nifedipine as effective alternatives 1
Oral nifedipine (long-acting) is an effective alternative for non-severe hypertension management in pregnancy 2
Hydralazine may be considered in the acute management of severe hypertension or preeclampsia, though it is no longer the drug of first choice due to more perinatal adverse effects compared to other medications 1, 2
For hypertensive crisis, sodium nitroprusside can be used as an IV infusion at 0.25-5.0 mg/kg/min, but prolonged treatment should be avoided due to risk of fetal cyanide poisoning 1
Nitroglycerin (glyceryl trinitrate) is the drug of choice specifically for preeclampsia associated with pulmonary edema 1
Current evidence supports maintaining blood pressure between 110-135/85 mmHg to reduce the risk of accelerated maternal hypertension while minimizing impairment of fetal growth 3, 4
A systolic blood pressure ≥170 mmHg or diastolic blood pressure ≥110 mmHg should be considered an emergency requiring immediate hospitalization 1, 5
Treatment should be deintensified if blood pressure falls below 90/60 mmHg to prevent compromised uteroplacental perfusion 4

ACE inhibitors, angiotensin receptor blockers (ARBs), direct renin inhibitors, and mineralocorticoid receptor antagonists are contraindicated during pregnancy 3, 4
These medications can cause fetal renal dysplasia, oligohydramnios, pulmonary hypoplasia, and intrauterine growth restriction 4
Women planning pregnancy or who become pregnant while on these medications should be switched to pregnancy-safe alternatives immediately 4
Diuretics are generally not recommended for blood pressure management in pregnancy but may be used in late-stage pregnancy if needed for volume management 4
Beta-blockers other than atenolol may be used if necessary; atenolol specifically is not recommended 4
Low-dose aspirin (100-150 mg/day) starting at 12-16 weeks of gestation is recommended for pregnant individuals with diabetes to reduce preeclampsia risk 4

The American College of Cardiology recommends classifying hypertension in pregnancy as pre-existing hypertension, gestational hypertension, or pre-eclampsia, with transient gestational hypertension carrying a 20% risk of developing pre-eclampsia 6, 7
For non-severe hypertension, the European Society of Cardiology suggests methyldopa as the first-line agent, with labetalol as an effective alternative 8, 9
For severe hypertension, the European Society of Cardiology recommends intravenous labetalol as first-line treatment, with oral methyldopa or nifedipine as alternatives 9, 10
The European Society of Cardiology advises against using ACE inhibitors, ARBs, and direct renin inhibitors in pregnancy due to fetotoxicity 8
Target blood pressure should be 140-150/90-100 mmHg in severe hypertension, avoiding excessive lowering to prevent impairing uteroplacental perfusion 9, 8

The European Neurological Society suggests non-pharmacological approaches, such as relaxation techniques and avoidance of triggers, as first-line management for migraine 8

The American Academy of Neurology recommends multidisciplinary communication among clinicians throughout pregnancy, delivery, and postpartum period 11
Regular monitoring of blood pressure and assessment of fetal growth is essential, according to the American College of Obstetricians and Gynecologists 6

The European Society of Cardiology recommends low-dose aspirin prophylactically for women with a history of early-onset pre-eclampsia, starting before 16 weeks gestation 8
Calcium supplementation may be beneficial in high-risk women, according to the European Society of Cardiology 8
The American College of Obstetricians and Gynecologists advises that mode of delivery should not be determined solely based on hypertension or migraine history 11