Early pregnancy heart racing: causes and warning signs

Palpitations may feel like pounding, fluttering, skipped beats, or a fast pulse. Pregnancy can change blood flow and place greater demand on the heart. Stress, poor sleep, dehydration, fever, caffeine, low blood sugar, and anaemia can also contribute. Less commonly, an irregular rhythm, thyroid overactivity, or another heart condition may be involved. The sensation alone cannot determine the cause, so the pattern and accompanying symptoms matter.

Stop strenuous activity, sit or lie safely, and breathe slowly. Drink water if you have not been told to restrict fluids, and eat a small snack if you may have missed a meal. Note the start and end of the episode, your pulse if you can measure it comfortably, triggers, and symptoms such as dizziness or chest discomfort. Reduce caffeine and do not take heart, thyroid, or stimulant medicines without medical advice. Arrange a review if episodes recur.

Call emergency services for palpitations with chest pain, severe breathlessness, fainting, collapse, confusion, or a sustained very fast or irregular heartbeat. Seek prompt clinical advice for recurrent episodes, dizziness, unusual fatigue, swelling, fever, or symptoms of dehydration. Assessment may include an examination, blood tests, and an electrocardiogram to check the rhythm and possible contributors.

Ask whether you need an electrocardiogram or blood tests for anaemia, thyroid function, or electrolytes. Share your pregnancy stage, episode pattern, caffeine intake, medicines, supplements, previous heart history, and any fainting or breathing difficulty.