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Heart Palpitations in Pregnancy: Causes and Treatment

July 23, 2025

Pregnancy is a time marked by incredible physical and emotional shifts. A symptom that is likely to come as a surprise to expectant mothers is heart palpitations in pregnancy. Those feelings of fluttering, pounding, or racing heart rate can be thrilling but also terrifying when they happen for the first time or consistently on a regular basis. 

Knowing the reasons for them, when to get concerned, and how to cope with them can come as a blessing of reassurance during this special time.

What Are Heart Palpitations?

Heart palpitations refer to an increased awareness of your heartbeat. Other women have described the sensation as their heart missing a beat, fluttering, or racing. Although these incidents are usually harmless, they can also sometimes indicate underlying issues.

Normally, an adult’s heart rate would be between 60 and 100 beats per minute. Pregnancy, however, increases this rate naturally due to changes in blood volume and hormonal function. Awareness of what constitutes normal versus abnormal heart palpitations during pregnancy is crucial for good care and reassurance.

Heart Palpitations in Pregnancy: Why They Occur

Having palpitations during pregnancy is quite normal. The body makes immense cardiovascular adjustments to accommodate the fetus's growth, including:

  • Increased volume of blood: During the third trimester, blood volume may swell by as much as 50%, putting extra strain on the heart.
  • Hormonal changes: Progesterone surge can affect the functioning of the heart, causing abnormal heart rhythms.
  • Increased anxiety or stress: Emotional alterations and anticipation of giving birth can play a role in influencing heart rhythm.
  • Dehydration, caffeine, or sleeplessness: These are also contributing factors to palpitations at this time.

Causes of Heart Palpitations in Pregnancy

Understanding the underlying cause can help in differentiating between normal and concerning symptoms. Causes include: 

  • Thyroid conditions: Hyperthyroidism causes the heart to beat faster and with an irregular rhythm.
  • Anxiety and tension: These are emotional set-offs common during pregnancy.
  • Electrolyte imbalance: Potassium or magnesium level changes can affect heart function.
  • Stimulants: Caffeine or some medications may induce palpitations.

Heart Palpitations during Early Pregnancy

It is not uncommon to experience heart palpitations in early pregnancy, including in the first trimester. Early symptoms can be due to the initial hormonal surge, higher metabolic rate, and emotional changes. Although these palpitations may be benign, they can be felt because of the body's increased sensitivity.

During heart palpitations in early pregnancy, it’s important to monitor for additional symptoms like dizziness, shortness of breath, or chest pain, as these could indicate the need for medical evaluation.

Heart Palpitations Pregnancy: When to Worry

While palpitations are generally harmless, there are circumstances in which they point towards urgent intervention. It's critical to wonder: heart palpitations in pregnancy, when to worry?

Obtain medical attention if palpitations are accompanied by:

  • Chest pain or tightness
  • Severe dizziness or fainting
  • Shortness of breath
  • Persistent rapid heart rate over 100 bpm at rest

So, what is a dangerous heart rate for a pregnant woman? A sustained resting heart rate above 120 beats per minute, especially with other symptoms, can be a cause for concern and should be evaluated by a healthcare provider.

Book an online appointment with Dr. Suman Mehla for Pregnancy & Gynecology related issues.

Diagnosis and Tests

If you’re experiencing frequent or severe palpitations, your doctor may recommend diagnostic tests such as:

  • Electrocardiogram (EKG): Quantifies heart rhythm and electrical activity.
  • Holter monitor: A Portable 24-hour monitor to record heartbeats for a day.
  • Blood tests: To determine if there is thyroid dysfunction, anaemia, or electrolyte disturbances.
  • Echocardiogram: Ultrasound to examine heart structure and performance.

Early diagnosis is key to maternal and fetal health, especially if symptoms persist.

Treatment Options and Management

Treating heart palpitations in pregnancy usually starts with lifestyle modifications:

  • Hydration: Drink plenty of fluids during the day.
  • Do not use caffeine and stimulants: These can exacerbate palpitations.
  • Practice stress reduction: Methods such as prenatal yoga, deep breathing, or meditation can be helpful.

In very severe cases, medications such as beta-blockers may be given, but only by an OB/GYN or cardiologist. Be sure to discuss the risks and benefits of any medication during pregnancy.

Prevention Tips

Although it's not possible to prevent every palpitation, taking these measures can reduce your risk:

  • Eat a balanced diet with plenty of iron and vital nutrients. 
  • Drink plenty of water and limit caffeine consumption.
  • Ensure you get enough rest and observe good sleep hygiene.
  • Make regular prenatal visits to keep track of overall health and solve issues early.

How Cloudnine Stands Apart

We at Cloudnine believe that each pregnancy is different. Our expert obstetricians, cardiologists, and maternal health specialists work in tandem to provide the safest possible outcomes for mother and baby. Coupled with state-of-the-art diagnostic equipment, 24/7 monitoring, and empathetic care, Cloudnine provides end-to-end care to women with heart palpitations during pregnancy. Whether it's a normal checkup or a complicated cardiac assessment, rest assured, we're here to ensure your experience is smooth and stress-free.

Conclusion

While pregnancy heart palpitations may be concerning, they're usually a normal reaction to the altered hormone levels and physiology of pregnancy. Nevertheless, knowing when to worry about heart palpitations is imperative. Don't take ongoing or drastic symptoms for granted, and always check with your healthcare provider when in doubt.

Early detection and effective management can enable you to have a healthier, carefree pregnancy.

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