Peripartum Cardiomyopathy (PPCM)

What happens in peripartum cardiomyopathy

The left ventricle, the heart's main pumping chamber, weakens and often enlarges, similar to dilated cardiomyopathy, reducing the amount of blood pumped with each beat. Fluid backs up into the lungs and body. The exact cause is not fully understood, but evidence points to:

• a damaged fragment of the hormone prolactin that harms heart muscle and blood vessels
• blood vessel imbalance in late pregnancy, overlapping with preeclampsia
• genetic predisposition, including variants also found in dilated cardiomyopathy

Timing and definition

PPCM is defined as:

• heart failure developing toward the end of pregnancy or in the months after delivery (most within the first month postpartum)
• left ventricular ejection fraction below 45%
• no other identifiable cause

Risk factors

• Black race
• maternal age over 30
• preeclampsia and other high blood pressure in pregnancy
• twins or more
• multiple previous pregnancies
• obesity, diabetes, smoking
• family history of cardiomyopathy
• prolonged use of tocolytic medicines

Symptoms

• shortness of breath, especially lying flat or with exertion
• waking at night breathless
• swelling of the feet, ankles, legs or belly
• unusual tiredness
• persistent cough, sometimes with frothy sputum
• palpitations or a racing heart
• chest discomfort
• dizziness or fainting

Because many of these also occur in normal late pregnancy, symptoms that are severe, worsening or present after delivery should be checked.

Diagnosis

• echocardiogram: the key test, showing reduced ejection fraction
• BNP or NT-proBNP blood test: raised in heart failure
• ECG and heart rhythm monitoring
• chest X-ray: fluid in the lungs, enlarged heart
• blood tests to exclude thyroid disease, anemia and other causes
• cardiac MRI in some cases
• genetic testing may be offered

Treatment

Heart failure medicines

Choices depend on whether the woman is still pregnant or breastfeeding:

• diuretics (water pills) to remove extra fluid
• beta blockers such as metoprolol
• hydralazine and nitrates during pregnancy
• ACE inhibitors after delivery (some, such as enalapril, are compatible with breastfeeding). ACE inhibitors, ARBs and some other heart failure medicines are avoided in pregnancy because they harm the baby
• other medicines such as mineralocorticoid antagonists, sacubitril-valsartan and SGLT2 inhibitors after delivery when not breastfeeding, as advised

Blood thinners

Because a weak heart and the postpartum state both raise clot risk, anticoagulation is often recommended when the ejection fraction is very low or a clot is found.

Bromocriptine

Bromocriptine, which stops prolactin release, is used in some countries alongside standard treatment, based on studies suggesting improved recovery. It stops breastfeeding and requires anticoagulation. Its use varies by guideline and center.

Advanced therapies

Severe cases may need intensive care, mechanical heart support, a wearable defibrillator vest, or, rarely, heart transplant.

Delivery planning

If PPCM is diagnosed during pregnancy, a team of cardiologists, obstetricians and anesthesiologists plans the timing and mode of delivery.

Outlook

Many women recover normal or near-normal heart function and no longer have heart failure, usually within 6 to 12 months, especially if the ejection fraction was above 30% at diagnosis. Others have lasting heart failure. Ongoing follow-up is needed even after recovery.

Future pregnancies

A subsequent pregnancy carries a risk of PPCM recurring. The risk is highest when heart function has not fully recovered, and some women are advised against further pregnancy. Anyone with a history of PPCM should see a cardiologist and obstetrician before conceiving and discuss safe contraception.

Frequently asked questions

What is peripartum cardiomyopathy?

It is a form of heart failure that develops in late pregnancy or in the months after delivery in women without previous heart disease. The heart muscle weakens, reducing pumping function and causing fluid to build up.

What are the symptoms of peripartum cardiomyopathy?

Symptoms include breathlessness, especially lying flat or at night, swelling of the legs and belly, extreme tiredness, cough, palpitations and chest discomfort. Because these overlap with normal pregnancy, worsening or postpartum symptoms should be checked.

Can you recover from peripartum cardiomyopathy?

Yes, many women recover normal or near-normal heart function within 6 to 12 months with treatment. Recovery is more likely when the heart is less severely affected at diagnosis. Some have lasting heart failure needing long-term treatment.

Can I breastfeed with peripartum cardiomyopathy?

Often yes, with medicines compatible with breastfeeding, such as certain beta blockers and ACE inhibitors like enalapril. If bromocriptine is used, breastfeeding stops. Discuss options with your cardiology and obstetric team.

Can I have another baby after peripartum cardiomyopathy?

It depends on how fully your heart recovered. Recurrence risk is significant, and highest if heart function remains reduced. See a cardiologist before planning another pregnancy.