Pregnancy Heart Murmur: What It Means and When to See a Doctor 💓
A pregnancy heart murmur is a common finding and is usually nothing to worry about. It often develops because your heart and circulatory system are working harder to support both you and your growing baby. If your OB-GYN or family doctor hears a heart murmur, it doesn’t automatically mean there’s a problem, but it’s always wise to pay attention to any symptoms that come with it.
Heart murmurs in pregnancy are frequent because your blood volume increases significantly, your heart pumps harder, and hormonal changes affect your circulation. These changes can create extra sounds that your doctor may pick up with a stethoscope.
What Is a Heart Murmur? – Definition and Basics
A heart murmur is an extra sound heard alongside the normal heartbeat. It can be soft, whooshing, or even a rushing noise. During pregnancy, most heart murmurs are functional, meaning they’re not caused by heart disease.
Why Do Heart Murmurs Develop in Pregnancy?
- Increased blood volume: Your blood volume can rise by 30–50% to support your baby’s development.
- Extra workload for the heart: Your heart has to pump more blood, which can change the sounds it makes.
- Hormonal effects: Progesterone and other hormones relax your blood vessels, which also affects how your heart works.
How Does a Pregnancy Heart Murmur Develop? 🔬
Most pregnancy heart murmurs happen because your circulatory system is adapting. Your heart beats faster and stronger to deliver the extra blood everywhere it’s needed, including to your uterus and baby.
This increased blood flow can cause turbulence around the heart valves, which creates the murmur your doctor hears.
Real-Life Examples – When Might You Notice a Heart Murmur?
- Routine prenatal checkups: Your doctor may hear a murmur even if you feel fine.
- After fatigue, stress, or physical activity: The murmur may sound louder, but this doesn’t mean you’re sick.
- During hormonal changes: As pregnancy progresses, the sound of the murmur may change.
Possible Risks – When Is a Heart Murmur Not Harmless?
While most pregnancy heart murmurs are benign, rarely they can signal an underlying heart condition or valve problem. Watch for these symptoms:
- Shortness of breath
- Chest pain
- Dizziness or fainting
- Rapid or irregular heartbeat
- Fatigue or weakness
If you notice any of these, contact your doctor right away.
Medical Background – What Happens to the Heart During Pregnancy?
During pregnancy, your heart works harder, your pulse rate goes up, and the heart muscle may thicken slightly. Blood flow through the valves can get louder, but this is usually not a sign of disease.
Your doctor will decide if further tests, like an EKG or heart ultrasound, are needed based on the type of murmur, its loudness, and any symptoms you have.
When Should You See a Doctor? 🚨
See your doctor immediately if:
- You have shortness of breath, chest pain, dizziness, or fainting
- Your heart murmur comes with rapid or irregular heartbeat
- You feel unusually tired or weak along with the murmur
Most pregnancy heart murmurs don’t need treatment, but for your safety, always discuss new or unusual symptoms with a healthcare professional.
What Should You Do If You’re Told You Have a Heart Murmur?
- Don’t panic! Most cases are harmless.
- Pay attention to your body: Write down any new symptoms.
- Ask your doctor questions: Share your concerns or uncertainties.
- Avoid overexertion: Rest when you feel tired.
Supportive Thoughts for Expecting Moms 🌱
Hearing you have a heart murmur during pregnancy can be unsettling, but it’s often a normal part of your body’s changes. By listening to your body and staying in touch with your doctor, you’re keeping yourself and your baby safe.
For more trustworthy information about the physical and emotional changes of pregnancy, our app offers guides and tips to help you feel confident and calm every day.