Vasovagal syncope during pregnancy: treatment and safety

A vasovagal episode happens when the nervous system briefly lowers blood pressure and may slow the heartbeat. Pregnancy can make standing, overheating, prolonged waiting, or lying flat on the back uncomfortable, and fainting can injure you or your pregnancy if you fall. Warning sensations may include warmth, nausea, sweating, light-headedness, blurred vision, or muffled hearing. A faint should not automatically be attributed to pregnancy; anaemia, dehydration, low blood sugar, and heart-rhythm problems can also need assessment.

At the first warning, sit or lie on your side in a safe place and ask someone to stay with you. Loosen tight clothing, keep the room cool, and avoid standing quickly. Once fully alert, take small sips of fluid if you can swallow safely and follow your maternity clinician’s advice about regular meals. Your clinician may review medicines, blood pressure, blood count, hydration, and heart rhythm. Do not drive, climb, or bathe alone until the cause and safety plan are clear.

Seek urgent help if you faint during pregnancy and have chest pain, trouble breathing, a severe headache, seizure-like movements, significant injury, vaginal bleeding, abdominal pain, persistent confusion, or a racing or irregular heartbeat. Arrange prompt medical review for a first faint, repeated episodes, fainting during exertion, or an episode without warning. Call emergency services if you remain unresponsive or cannot breathe normally.

Ask whether you need a blood count, glucose check, blood-pressure measurements, or an electrocardiogram; which sleeping position is suitable for you; how much fluid is appropriate; and when it is safe to return to work, exercise, driving, or procedures.