Maternal Cardiac Complications
Heart and circulation problems during and after pregnancy
Quick Facts
- Type: Cardiovascular complications of pregnancy
- When they occur: Late pregnancy, labor, and the weeks after delivery
- Examples: Heart failure, arrhythmia, peripartum cardiomyopathy
- Seek urgent care: Chest pain, severe breathlessness, fainting
Overview
Maternal cardiac complications are heart and circulation problems that affect the pregnant or recently delivered parent. Pregnancy normally raises blood volume and makes the heart work harder, and these demands peak in late pregnancy, during labor, and in the first days to weeks after birth. In some people these stresses lead to new or worsening heart problems.
Complications can affect someone with known heart disease or appear unexpectedly in a person whose heart was previously healthy. They include heart failure, abnormal heart rhythms, a pregnancy-related weakening of the heart muscle, and complications driven by very high blood pressure. Recognizing warning signs early and getting prompt care greatly improves outcomes.
Symptoms
Because tiredness, mild breathlessness, and swelling are common in normal pregnancy, more serious heart symptoms can be missed. Warning signs include:
- Shortness of breath that is severe, sudden, or worse when lying flat
- Chest pain or pressure
- Rapid, pounding, or irregular heartbeat
- Fainting or near-fainting
- Severe or rapidly worsening swelling of the legs, hands, or face
- Persistent cough, sometimes with pink, frothy sputum
Chest pain, fainting, severe breathlessness, or coughing up blood during or after pregnancy are medical emergencies. Call emergency services immediately.
Causes
These complications arise when the cardiovascular changes of pregnancy overwhelm the heart or interact with other conditions.
- Peripartum cardiomyopathy: A weakening of the heart muscle that develops in the last month of pregnancy or the months after delivery.
- Arrhythmias: Abnormal heart rhythms that may appear or worsen in pregnancy.
- Worsening of existing heart disease: Valve disease or congenital defects placed under extra strain.
- Hypertensive complications: Severe high blood pressure, including preeclampsia, that strains the heart.
- Heart attack or aortic problems, which are uncommon but serious.
Risk Factors
- Pre-existing heart disease, valve disease, or arrhythmia
- High blood pressure, preeclampsia, or gestational diabetes
- Older maternal age
- Obesity
- Carrying twins or more
- A previous pregnancy complicated by heart problems such as peripartum cardiomyopathy
Diagnosis
Doctors evaluate symptoms with tests that are safe in pregnancy:
- Electrocardiogram (ECG): Records the heart's electrical rhythm.
- Echocardiogram: An ultrasound that shows how well the heart muscle and valves are working.
- Blood tests: Including markers of heart strain when heart failure is suspected, plus checks for preeclampsia.
- Blood pressure and oxygen monitoring.
Distinguishing serious heart problems from the normal symptoms of pregnancy is a key goal of the evaluation.
Treatment
Treatment depends on the specific complication and is delivered by a team of obstetric and heart specialists.
- Heart failure care: Medications to reduce fluid overload and support the heart, with bed rest and monitoring; some medicines are chosen specifically for safety in pregnancy or breastfeeding.
- Rhythm control: Medication or, when needed, procedures to manage dangerous arrhythmias.
- Blood pressure control: Urgent treatment of severe hypertension and preeclampsia, which may include planning early delivery.
- Delivery planning: Timing, location, and method of birth chosen to reduce strain, with close monitoring during and after labor.
Many people recover well, though some heart conditions can persist after delivery and need ongoing care.
Prevention
Not all complications can be prevented, but risk can be lowered:
- Have a pre-pregnancy heart assessment if you have a known heart condition
- Control blood pressure, diabetes, and weight before and during pregnancy
- Attend all prenatal appointments and report new symptoms early
- Take only medications confirmed safe by your care team
- Continue follow-up after delivery, especially if a complication occurred
When to See a Doctor
Contact your care team promptly for new breathlessness, palpitations, or fast-worsening swelling during or after pregnancy. Seek emergency care immediately for:
- Chest pain or pressure
- Severe shortness of breath or breathlessness lying flat
- Fainting or near-fainting
- Coughing up blood or pink, frothy sputum
- A very fast or irregular heartbeat with dizziness
Frequently Asked Questions
What is peripartum cardiomyopathy?
It is a weakening of the heart muscle that develops late in pregnancy or in the months after delivery, leading to heart failure. Many people improve with treatment, but it can persist and requires close cardiology follow-up.
How do I tell normal pregnancy symptoms from a heart problem?
Mild breathlessness, tiredness, and ankle swelling are common in pregnancy. Severe or sudden breathlessness, chest pain, fainting, palpitations with dizziness, or coughing up frothy sputum are warning signs that need urgent medical attention.
Can maternal cardiac complications affect the baby?
Yes. Reduced blood flow or low oxygen in the parent can affect the baby's growth and wellbeing, and severe complications may require early delivery. Close monitoring of both parent and baby is part of management.
Do heart complications go away after delivery?
Some, such as blood-pressure-related strain, often improve after delivery, while others like peripartum cardiomyopathy may take months or persist. Ongoing follow-up after birth is important.
When is this a medical emergency?
Call emergency services for chest pain, severe shortness of breath, fainting, coughing up blood, or a fast irregular heartbeat with dizziness, at any point during or after pregnancy.
References
- American Heart Association. Heart Disease and Pregnancy.
- Mayo Clinic. Peripartum cardiomyopathy.
- MedlinePlus, U.S. National Library of Medicine. Pregnancy and heart disease.
- American College of Obstetricians and Gynecologists (ACOG). Pregnancy and Heart Disease.