You are sitting on the couch, one hand on your growing belly, and suddenly you feel your heart skip or race. Maybe it flutters for a few seconds. Maybe it pounds hard enough that you pause and wonder if something is wrong with you or the baby.
Heart palpitations during pregnancy are more common than most people expect. Your blood volume rises, your heart works harder, and hormone shifts can make every beat feel louder. For many pregnant patients, that racing or fluttering feeling is uncomfortable but not dangerous. For others, it is a signal that deserves a closer look.
At Prime Heart and Vascular, we help patients in Plano, Frisco, Allen, and nearby North Texas communities sort out what is normal pregnancy body changes and what needs cardiology follow-up. Your OB is your main guide during pregnancy. But if palpitations are frequent, worsening, or coming with other symptoms, a heart evaluation can give you real answers instead of late-night worry.
What do heart palpitations feel like during pregnancy?
Heart palpitations are the sensation that your heart is beating too fast, too hard, too slow, or in an irregular pattern. During pregnancy, patients often describe:
- A flutter or flip in the chest
- A pounding heartbeat you can feel in your throat or neck
- A skipped beat followed by a strong thump
- A racing heart that seems to come out of nowhere
- A heartbeat that feels irregular or “off rhythm”
These feelings may last a few seconds or linger longer. They can happen once in a while or several times a day. Some patients notice them after climbing stairs, eating a big meal, lying on their left side, or simply resting with nothing else to focus on.
Palpitations are real symptoms. They are not “just in your head.” The question is whether they reflect normal pregnancy changes or something that needs testing.
Why does your heart work harder during pregnancy?
Pregnancy places real demands on the cardiovascular system. By the second trimester, blood volume can increase by 30 to 50 percent. The heart pumps more blood with each beat. Resting heart rate often rises by 10 to 20 beats per minute. That alone can make you more aware of your heartbeat.
Hormones play a role too. Progesterone can affect blood vessels and heart rate. Estrogen shifts may influence how sensitive you feel to changes in rhythm. Some patients who never noticed palpitations before pregnancy start feeling them in the first or second trimester.
As the uterus grows, it can push against the diaphragm and major blood vessels when you lie flat. That positional change sometimes makes palpitations more noticeable at night or when you are on your back. If you have read about heart palpitations at night, some of the same awareness factors apply during pregnancy, with added hormonal and circulatory changes on top.
Common causes of palpitations that are usually not emergencies
Not every flutter means something is seriously wrong. Many pregnancy palpitations have straightforward explanations.
Normal pregnancy circulation changes
A faster resting heart rate and stronger pulse are common as pregnancy progresses. Your body is supporting two people. Feeling your heart beat more often, especially after activity, can be part of that normal shift.
Dehydration and low blood pressure
Morning sickness, busy days, Texas heat, and forgetting to drink enough water can leave you dehydrated. Low fluid volume can make the heart beat faster to maintain blood flow. Some pregnant patients also feel lightheaded when standing quickly, which may come with a brief racing heartbeat.
Anxiety and poor sleep
Pregnancy brings real stress, even in happy pregnancies. Worries about the baby, work, body changes, and delivery can raise adrenaline. That can speed up the heart. Poor sleep makes everything feel more intense, including heartbeat awareness.
Caffeine, sugar, and big meals
Coffee, tea, chocolate, and energy drinks can trigger palpitations in sensitive patients. If you have noticed flutters after your morning latte, you are not alone. Prime has a full guide on heart palpitations after coffee or energy drinks that applies to pregnancy too, with extra reason to watch your intake.
Large meals can shift blood flow toward digestion and briefly change how your heart feels. Some patients notice palpitations after eating, especially if the meal was heavy or high in sugar.
Anemia and thyroid changes
Iron deficiency anemia is common in pregnancy. When the blood carries less oxygen, the heart may beat faster to compensate. Thyroid problems can also cause palpitations, weight changes, heat intolerance, or shakiness. These conditions are worth checking because they are treatable.
Extra or skipped beats
Many healthy patients have occasional premature beats, often called PVCs or PACs. Pregnancy can make these more noticeable. A few isolated flutters without other symptoms are often harmless, but recurring episodes should be discussed with your provider.
When heart palpitations during pregnancy need prompt attention
Most pregnancy palpitations are not emergencies. But some patterns should not wait for a routine visit.
Call your OB or seek urgent care the same day if palpitations come with:
- Chest pain or pressure that does not go away
- Severe shortness of breath at rest
- Fainting or feeling like you will pass out
- A sustained heart rate over 120 at rest that does not slow down
- Significant dizziness or confusion
- Leg swelling with sudden shortness of breath
- Known heart disease and new or worsening symptoms
Call 911 if you have crushing chest pain, severe trouble breathing, fainting, or symptoms that feel like a possible heart attack or stroke.
Schedule a non-urgent but timely evaluation if palpitations are frequent, lasting longer than usual, waking you from sleep, or making it hard to function. You should also be seen if they started suddenly in the third trimester, feel clearly irregular, or continue even when you are resting and well hydrated.
Should you call your OB or a cardiologist?
Start with your OB or midwife. They know your pregnancy history, blood pressure trends, and lab results. They can check for anemia, thyroid issues, dehydration, and other pregnancy-related causes.
A cardiologist may be helpful when:
- Palpitations are frequent or worsening despite basic fixes
- You have a prior heart condition, arrhythmia, or congenital heart issue
- Your OB wants a rhythm specialist involved
- Testing such as a heart monitor or echocardiogram is needed
- Symptoms suggest a sustained arrhythmia rather than occasional flutters
Cardiology and obstetrics often work together during pregnancy. The goal is to protect both you and the baby with the right level of testing, not unnecessary worry.
Heart rhythm problems that can show up during pregnancy
Most pregnancy palpitations are not caused by a dangerous arrhythmia. But pregnancy can unmask rhythm issues that were mild before or trigger new ones in susceptible patients.
Supraventricular tachycardia, or SVT, can cause sudden episodes of rapid heartbeat. Atrial fibrillation is less common in young pregnant patients but can occur, especially with prior heart disease, high blood pressure, or hyperthyroidism. Some patients develop palpitations related to structural heart changes that were present before pregnancy but never caused symptoms.
If your heartbeat feels irregular and stays that way, not just a brief flutter, tell your provider. Prime Heart and Vascular evaluates rhythm concerns through our arrhythmia specialist services. For a broader overview of what palpitations are, see our article on what heart palpitations are and how patients describe them.
How doctors evaluate palpitations during pregnancy
Your visit usually starts with your story. Be ready to share when symptoms began, which trimester you are in, how often palpitations happen, how long they last, and what they feel like. Mention caffeine, sleep, stress, anemia history, thyroid disease, prior heart problems, and any medications or supplements.
Depending on your symptoms, evaluation may include:
- A physical exam and blood pressure check
- Blood work for anemia, thyroid function, and electrolytes
- An electrocardiogram, or EKG, to look at heart rhythm at the time of the visit
- A heart monitor worn for a day or longer to capture palpitations as they happen
- An echocardiogram, an ultrasound of the heart, to assess structure and function
Most tests used in cardiology are safe during pregnancy when ordered thoughtfully. Your providers will choose testing based on symptom severity and your stage of pregnancy, not a one-size-fits-all panel.
What you can do at home while you wait for answers
Home care does not replace medical evaluation for concerning symptoms. But these steps may help if your provider has already assessed you and ruled out urgent problems.
Track the pattern
Note the time, what you were doing, how long palpitations lasted, and anything unusual that day. Include caffeine, meals, sleep, stress, and activity. Patterns help your OB or cardiologist see the bigger picture quickly.
Stay hydrated
Drink water steadily through the day, especially if you have morning sickness or spend time outside in North Texas heat. Dehydration is a fixable trigger for many patients.
Cut back on caffeine
Pregnancy guidelines already suggest limiting caffeine. If palpitations follow coffee or tea, try reducing further and see if symptoms improve.
Try side sleeping
Lying on your left side can improve blood flow in late pregnancy. If palpitations feel worse flat on your back, use pillows to stay tilted. This may also reduce the heavy heartbeat sensation some patients feel when the uterus presses on major vessels.
Manage stress and sleep
Short walks, breathing exercises, and a consistent bedtime can lower adrenaline spikes. Poor sleep makes palpitations feel scarier than they might be medically.
Do not stop prescribed medications on your own
If you take heart medications, thyroid drugs, or other prescriptions, talk with your providers before changing anything. Some medicines need dose adjustments during pregnancy. Others should not be stopped abruptly.
Will palpitations go away after delivery?
For many patients, yes. As blood volume and hormone levels shift back toward baseline, palpitations often fade within weeks to months after delivery. But not everyone returns to their pre-pregnancy pattern immediately. Sleep deprivation, breastfeeding demands, anemia after delivery, and anxiety in the postpartum period can keep symptoms going for a while.
If palpitations persist after delivery, continue follow-up. A rhythm issue that appeared during pregnancy may still need treatment even when the pregnancy is over.
Exercise and palpitations during pregnancy
Regular activity is encouraged in most uncomplicated pregnancies. Walking, swimming, and prenatal exercise classes support circulation and stamina. But if palpitations hit every time you work out, scale back and talk with your provider.
Stop exercise and seek care if palpitations come with chest pain, severe shortness of breath, dizziness, or a heartbeat that will not slow down after you rest. A cardiology visit can help you find a safe activity level rather than giving up movement entirely.
When to schedule a visit with Prime Heart and Vascular
Consider scheduling a cardiology appointment if pregnancy palpitations are frequent, worsening, or paired with shortness of breath, chest discomfort, dizziness, or a clearly irregular heartbeat. You should also be seen if you have a known heart condition, a family history of sudden cardiac death or serious rhythm problems, or if your OB recommends cardiology input.
Prime Heart and Vascular provides heart rhythm evaluation, palpitation workups, and coordinated care for patients in Plano, Frisco, Allen, and surrounding communities. Our heart specialist team works with your obstetric provider when pregnancy adds another layer to the picture.
Feeling your heart race while pregnant can be unsettling. Most of the time, it ties back to normal changes, dehydration, stress, or a trigger you can adjust. When the pattern does not fit that story, you deserve a clear workup and a plan that keeps both you and your baby in view.
If palpitations are on your mind more days than not, start by mentioning them at your next prenatal visit. Then reach out for cardiology support when symptoms need a deeper look.
Schedule an appointment with Prime Heart and Vascular to talk with a cardiology provider about heart palpitations during pregnancy.
Frequently asked questions about heart palpitations during pregnancy
They can be. Many pregnant patients notice a faster heartbeat or occasional flutters because blood volume rises and the heart pumps more with each beat. Brief episodes without chest pain, severe shortness of breath, dizziness, or fainting are often related to normal pregnancy changes, dehydration, caffeine, stress, or poor sleep. That does not mean you should ignore them if they are frequent or worsening. Tracking symptoms and discussing them with your OB helps separate common pregnancy effects from rhythm problems that need testing.
Your heart races during pregnancy mainly because it is moving more blood to support you and the baby. Blood volume increases significantly, resting heart rate often rises, and hormones such as progesterone affect vessels and rhythm awareness. Activity, heat, dehydration, anxiety, anemia, and thyroid shifts can add to the effect. Lying on your back in late pregnancy may also make your pulse feel stronger. A racing heart is not always abnormal in pregnancy, but sustained rapid rates at rest or symptoms that keep returning should be evaluated.
Worry enough to seek prompt care if palpitations come with chest pain, severe shortness of breath, fainting, confusion, or a resting heart rate that stays very fast and does not settle. Call 911 for crushing chest pain or severe breathing trouble. For non-emergency concerns, schedule a visit if palpitations are frequent, lasting longer than usual, clearly irregular, waking you from sleep, or getting worse in the third trimester. Also be seen if you have known heart disease, a prior arrhythmia, or symptoms that interfere with daily life.
Pregnancy itself usually causes a faster heartbeat rather than a dangerous irregular rhythm, but it can make existing rhythm issues more noticeable. Some patients develop palpitations from extra beats, SVT episodes, or less commonly atrial fibrillation, especially if they have underlying heart disease, high blood pressure, or thyroid problems. An occasional flutter may be benign. A heartbeat that feels consistently irregular should be checked with an EKG or heart monitor so your providers can see what the rhythm is doing during symptoms.
Start with your OB or midwife. They manage prenatal care and can screen for anemia, thyroid disease, blood pressure issues, and other pregnancy-related causes. See a cardiologist if palpitations are frequent or worsening, if your OB recommends it, if you have prior heart or rhythm problems, or if testing such as a monitor or echocardiogram is needed. Cardiology and obstetrics often coordinate during pregnancy so you get the right level of care without unnecessary tests.
Yes. Dehydration is a common trigger during pregnancy, especially with morning sickness, hot weather, or busy days without enough fluids. Low fluid volume can make the heart beat faster to maintain circulation. Electrolyte shifts from vomiting or poor intake can also affect rhythm. If palpitations improve when you hydrate well, dehydration may be part of the picture. Still mention recurring symptoms to your provider because dehydration is not the only possible cause.
Often they improve. After delivery, blood volume and hormone levels gradually return toward your pre-pregnancy baseline, and many patients notice fewer palpitations within weeks or months. Some symptoms linger because of postpartum anemia, sleep loss, stress, breastfeeding demands, or a rhythm issue that began during pregnancy. If palpitations continue after delivery, follow up with your OB and consider cardiology evaluation rather than assuming they will simply disappear on their own.
In most uncomplicated pregnancies, yes, with your provider’s guidance. Regular moderate activity supports healthy circulation. If palpitations occur during exercise, slow down, rest, and note whether they resolve. Stop and seek care if they come with chest pain, severe shortness of breath, dizziness, or a heartbeat that stays very fast after you stop. A cardiology visit can help set safe activity limits if symptoms are recurring rather than telling you to avoid all movement.