A new mother may describe it as being unable to catch her breath, feeling pressure in her chest, or suddenly realizing that walking across the room feels impossible. In the frightening conversation around PPCM versus pulmonary embolism, one truth matters most: both conditions can become life-threatening, and neither should be dismissed as normal postpartum exhaustion, anxiety, or the expected strain of caring for a newborn.

Peripartum cardiomyopathy, known as PPCM, and pulmonary embolism can share alarming symptoms. Yet they are different medical emergencies that require different testing and treatment. Knowing the patterns can help mothers, loved ones, and care teams speak up sooner - because early action can save lives.

PPCM versus pulmonary embolism: the core difference

PPCM is a form of heart failure that develops toward the end of pregnancy or in the months after delivery. The heart muscle becomes weakened and cannot pump blood as effectively as it should. Fluid can then back up into the lungs and other parts of the body, causing breathlessness, swelling, fatigue, and a racing heartbeat.

A pulmonary embolism, often called a PE, occurs when a blood clot travels to and blocks an artery in the lungs. Pregnancy and the postpartum period naturally increase the risk of blood clots. A PE can interfere with oxygen flow and put sudden strain on the heart, sometimes becoming critical within minutes or hours.

Both are urgent. But one is primarily a problem with the heart’s pumping ability, while the other is a blockage in the blood vessels of the lungs. That distinction guides the tests clinicians order and the care a mother needs.

Why the symptoms are so easy to confuse

Pregnancy and postpartum recovery already bring changes that can blur the picture. Some swelling, tiredness, shortness of breath with exertion, and a fast pulse may occur during a normal recovery. The danger comes when symptoms are new, worsening, severe, or paired with other warning signs.

PPCM often develops gradually, though it can also feel sudden. A mother may notice that she cannot lie flat without becoming short of breath, wakes up gasping for air, or needs extra pillows to sleep. Swelling in the feet, ankles, legs, or abdomen may increase quickly. Persistent palpitations, extreme fatigue that feels out of proportion, chest discomfort, dizziness, or fainting also deserve immediate attention.

Pulmonary embolism can be abrupt. Common signs include sudden unexplained shortness of breath, chest pain that may worsen with a deep breath or cough, a rapid heartbeat, lightheadedness, fainting, or coughing up blood. Some people have signs of a clot in the leg first, such as one-sided swelling, pain, tenderness, warmth, or redness in the calf or thigh.

There is overlap, and no symptom checklist can safely diagnose either condition at home. PPCM can cause chest pressure and a rapid heart rate. A PE can lead to severe shortness of breath and strain the heart enough to resemble heart failure. A mother can also have more than one serious health issue at once. That is why the safest response is not to try to sort it out alone.

Clues that may point toward PPCM

PPCM is especially worth raising when breathlessness is accompanied by signs of fluid retention or a reduced ability to function. Needing to sit upright to breathe, waking suddenly short of breath, gaining weight quickly from fluid, or having swelling on both sides of the lower body can fit a heart-failure pattern.

The timing matters, too. PPCM can occur during the last month of pregnancy or after delivery, including weeks and months into the postpartum period. A mother who has already been told her symptoms are “just postpartum” can still need urgent reevaluation if her condition is worsening.

Risk factors may include a history of PPCM, high blood pressure disorders of pregnancy such as preeclampsia, multiple gestation, older maternal age, or certain genetic and health factors. But PPCM can affect mothers without obvious risk factors. No one should have to prove that they fit a profile before their symptoms are taken seriously.

Clues that may point toward pulmonary embolism

Pulmonary embolism is more concerning when symptoms begin very suddenly, particularly with sharp or pleuritic chest pain, fainting, or signs of a blood clot in one leg. Risk can be higher after a cesarean delivery, prolonged bed rest or limited movement, major bleeding, infection, obesity, a personal or family history of clots, or an inherited clotting condition.

Still, risk factors are not a rule-out tool. A person can develop a PE without recognizing any specific risk factor. Sudden breathlessness after birth is enough reason to seek urgent medical evaluation, especially if it is paired with chest pain, a fast heartbeat, fainting, or one-sided leg symptoms.

How clinicians tell the difference

The question of PPCM versus pulmonary embolism cannot be answered by appearance, willpower, or a single symptom. Clinicians typically begin with vital signs, oxygen level, a physical exam, and an electrocardiogram. From there, testing depends on the symptoms and level of concern.

For suspected PPCM, an echocardiogram is especially important because it shows how well the heart is pumping and can reveal changes in heart size, valve function, or fluid-related strain. Blood tests may include BNP or NT-proBNP, which can rise when the heart is under stress. BNP testing can be a valuable early clue that a mother’s symptoms may be cardiac, but it does not diagnose PPCM by itself and should never delay emergency evaluation.

For suspected pulmonary embolism, clinicians may use imaging such as CT pulmonary angiography or a ventilation-perfusion scan, along with other testing based on the situation. An ultrasound of the legs may help identify a deep vein thrombosis. D-dimer testing can be more complicated during pregnancy and postpartum because levels may be elevated for reasons unrelated to a clot, so clinicians interpret it in context.

This process can feel overwhelming, especially when a mother is recovering from delivery or caring for an infant. But asking direct questions is appropriate: “Could this be PPCM?” “Could this be a pulmonary embolism?” “Do I need an echocardiogram or testing for a clot?” Clear questions can help move a concerning symptom conversation toward the right evaluation.

When to call 911 or seek emergency care

Call 911 or go to the emergency department now for severe or sudden shortness of breath, chest pain or pressure, fainting, confusion, blue or gray lips, coughing up blood, a very rapid or irregular heartbeat, or a sense that something is seriously wrong. Do not drive yourself if you are faint, severely short of breath, or having chest pain.

Urgent same-day medical assessment is also needed for worsening swelling, new trouble lying flat, waking up gasping, one-sided leg swelling or pain, persistent palpitations, or exhaustion so profound that ordinary activity is no longer possible. Tell the care team that you are pregnant or postpartum and state how long ago you delivered. Those details matter.

If a clinician has already evaluated symptoms but they worsen, change, or do not improve, return for care. Trusting your body is not overreacting. Maternal cardiac warning signs deserve a careful, timely response.

Advocacy can begin with one clear sentence

Mothers are too often taught to push through discomfort. In the postpartum period, that instinct can be dangerous. A partner, friend, family member, or postpartum support person can make a real difference by noticing breathlessness, swelling, chest pain, or an unusual decline in energy - and by helping a mother seek care without delay.

At HeartMomsPPCM, awareness is rooted in the belief that every mother deserves to be heard, tested when appropriate, and treated with urgency. Wearing red can start a conversation, but speaking up when symptoms appear can be an act of strength that protects a life. If breathlessness, chest pain, swelling, or a racing heart feels different or worse than expected, let that concern be heard today.