Heart racing while pregnant

Pregnancy changes blood flow and can make a normal increase in pulse feel prominent, especially after standing, climbing stairs, stress, heat, or poor sleep. Vomiting, reduced fluid intake, or missed meals can worsen the sensation. Anaemia and iron deficiency anaemia may present with palpitations and tiredness. Hyperthyroidism and atrial fibrillation are less common possibilities that require assessment rather than self-diagnosis.

Pause and sit or lie on your side if you feel light-headed. Sip fluids if you can keep them down, eat regular pregnancy-safe meals, and limit caffeine. Keep a note of the episode, your pregnancy stage, activity, medicines, and other symptoms. Tell your midwife, obstetric team, or doctor about recurring episodes so they can decide whether an examination, ECG, or blood tests are suitable.

Get emergency help for chest pain, severe breathlessness, fainting, confusion, blue lips, or a heartbeat that remains very fast or irregular. Seek prompt maternity or medical advice if palpitations accompany heavy vomiting, inability to drink, marked weakness, or reduced fetal movement when that concern applies to your stage of pregnancy.

Ask whether anaemia, thyroid function, dehydration, or a rhythm issue should be checked, and which medicines or supplements should be reviewed during pregnancy.