15/10/2026
6 Serious Causes of Fast Heartbeat During Pregnancy
A faster heartbeat can be normal during pregnancy because your heart pumps more blood to support your growing baby. However, some causes need urgent medical attention.
1. Severe Anemia
When your body lacks enough healthy red blood cells, your heart may beat faster to deliver oxygen to your tissues. Other signs include unusual tiredness, dizziness, and weakness.
2. Abnormal Heart Rhythm
An electrical problem in the heart can cause sudden episodes of racing or irregular heartbeat, sometimes with dizziness or chest discomfort.
3. Thyroid Problems
An overactive thyroid produces too much thyroid hormone, which can sp*ed up your heartbeat and cause sweating, shakiness, and unexplained weight changes.
4. Serious Infection
Infections, especially those causing fever, can make your heart beat faster. Warning signs may include chills, weakness, and feeling very unwell.
5. Pulmonary Embolism
A blood clot that travels to the lungs can cause a rapid heartbeat, sudden breathlessness, chest pain, or coughing up blood. This is a medical emergency.
6. Severe Dehydration
When your body loses too much fluid through vomiting, diarrhea, or inadequate drinking, your heart may beat faster to maintain blood circulation.
What Should You Do?
Rest, drink water if you can, and seek medical advice if your heartbeat remains unusually fast or keeps returning.
Seek emergency care for a racing heartbeat accompanied by chest pain, severe breathlessness, fainting, or severe dizziness.
Do not assume a persistent fast heartbeat is simply a normal part of pregnancy. A healthcare professional can identify the cause and recommend appropriate treatment.