Peripartum cardiomyopathy is a weakening of the heart muscle that develops late in pregnancy or in the months after delivery, in someone without a prior history of heart disease. It's uncommon, but recognizing it matters, since the symptoms can easily be mistaken for normal late-pregnancy or postpartum discomfort.
What Is Peripartum Cardiomyopathy?
A form of heart failure with reduced pumping function that develops specifically around the time of pregnancy — typically the last month of pregnancy through about five months after delivery — without another identifiable cause.
What's Happening in Your Heart
The left ventricle weakens and often enlarges, reducing how well the heart pumps — the same fundamental process as other forms of dilated cardiomyopathy, but with a specific pregnancy-related trigger that isn't yet fully understood. Hormonal changes late in pregnancy — including a specific fragment of a hormone called prolactin that's been implicated in some research — are thought to play a role in a genetically or otherwise susceptible heart, and a genetic predisposition is now recognized in a meaningful subset of cases.
Types & Causes
- The exact cause isn't fully understood, though several contributing factors are recognized
- Risk factors — multiple prior pregnancies, being over 30, preeclampsia or high blood pressure during pregnancy, carrying multiples (twins or more), and family history
- A recognized disparity worth knowing about — Black women are diagnosed with peripartum cardiomyopathy at meaningfully higher rates and tend to have more severe presentations and lower rates of full recovery than other groups, a disparity that reflects a combination of factors researchers are still working to fully understand, including access to care and underlying risk factor differences — worth an open conversation with your care team about your own individual risk and monitoring
- Not caused by anything the mother did — this isn't preventable in the way some other conditions are
Common Symptoms
Shortness of breath, swelling, and fatigue — symptoms that overlap significantly with normal late pregnancy, which is exactly why unusually severe or rapidly worsening versions of these symptoms deserve prompt evaluation rather than being dismissed.
How It's Diagnosed
An echocardiogram showing reduced ejection fraction, after other causes of heart failure are reasonably excluded. NT-proBNP blood testing and a careful symptom and exam history support the diagnosis — NT-proBNP is particularly useful here since it isn't significantly affected by normal pregnancy, unlike some other cardiac tests. (See Cardiac Testing & Imaging and Lab Tests & Diagnostics.)
Main Treatment Options
Standard heart failure medications, adjusted for pregnancy or breastfeeding safety when the diagnosis occurs before delivery — some heart failure medications aren't safe during pregnancy and require substitution, an important conversation between your cardiologist and obstetric team. After delivery, medications typically follow the standard four-pillar approach (see Medications 101). Close monitoring for recovery, and advanced therapies — including, rarely, mechanical support or transplant evaluation — in severe cases that don't respond to standard treatment.
Lifestyle Changes That Help
- Close, coordinated follow-up between cardiology and obstetrics (or, after delivery, cardiology alone)
- Standard heart failure sodium and fluid guidance
- A specific, individualized conversation about the safety of future pregnancies before considering one — recurrence risk in a future pregnancy is a genuine consideration (see Pregnancy & Heart Disease)
Living With It
About half of patients recover substantial or full heart function, often within months, though recovery can take up to a couple of years to become clear. Others have persistent reduced function requiring ongoing heart failure management. Following your EF and NT-proBNP over time, the same way any heart failure patient is followed, gives a real sense of the recovery trajectory rather than guessing. Future pregnancy carries a real risk of recurrence or worsening, especially if heart function hasn't fully recovered — a decision that deserves specialist input, not a default assumption either way.
When to Call Your Doctor vs. Go to the ER
- Increasing shortness of breath, swelling, or fatigue that feels different from typical pregnancy or postpartum symptoms
- Severe shortness of breath, chest pain, or symptoms that come on suddenly and feel alarming — during pregnancy or postpartum, don't wait to see if it passes
Common Questions
Is this my fault?
No — this isn't caused by anything you did, and blaming yourself doesn't reflect what's actually understood about why it happens.
Can I get pregnant again?
Possibly, but this needs a specific, individualized conversation with your cardiologist and obstetrician first — recurrence risk depends heavily on whether your heart function has fully recovered.
Will my heart go back to normal?
For many people, yes, substantially — but the timeline varies, and some people have lasting reduced function requiring ongoing care.
Why does race affect my risk?
This is a real, documented pattern in the research, not a reflection of anything about you individually — it's an active area of study, and it's a reasonable thing to raise directly with your care team so your monitoring plan accounts for your individual risk profile.
How soon after delivery can this appear?
It's typically defined as developing in the last month of pregnancy through about five months postpartum, though most cases are recognized in the weeks immediately surrounding delivery — new shortness of breath or swelling in that window deserves prompt evaluation rather than being assumed to be normal postpartum recovery.
Will breastfeeding affect my medications or recovery?
Some heart failure medications are compatible with breastfeeding and others aren't — this is worth a specific conversation with your cardiologist rather than assuming either that you must stop breastfeeding or that every medication is automatically safe.