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When you feel your heart skip a beat or beat faster than normal, the sensations are called palpitations. They may be brief and harmless—the result of a vigorous workout. Or, heart palpitations symptoms could indicate an arrhythmia or another heart problem.
An arrhythmia is a condition in which the heart’s electrical system doesn’t work properly, causing the heart to beat in an unhealthy manner. Palpitations are also among several sudden cardiac arrest symptoms, but in the majority of cases, they don’t predict such a serious event.
Sudden cardiac arrest occurs when the heart just suddenly stops beating. Unlike a heart attack, which is the result of blockage in the arteries within the heart, sudden cardiac arrest is usually the result of an electrical problem in the heart. Nerve signals that keep the heart pumping stop working, and the result, as you might imagine, can be quite serious.
Diagnosing Heart Palpitations Symptoms
Heart palpitations can come in many forms. They may feel like a fluttering in your chest. Or they may feel like a thudding or pounding sensation. Palpitations also include feelings you’re your heart is racing. And sometimes, you may be aware of your heart skipping a beat, or going out of its usual rhythm occasionally.
If you notice any of these feelings, pay close attention to them. When you see a healthcare provider, the more accurately you can describe your heart palpitations symptoms, the better chance your doctor will have of diagnosing the problem.
To evaluate the kind of palpitations you’re experiencing and determine what might be causing them, your doctor will listen to your heart. You’ll also probably be given an electrocardiogram (EKG), a harmless test that measures the heart’s electrical activity. If you’re having palpitations during the EKG, the test will reveal the unusual rhythm.
If the EKG is normal, you may still have a condition that’s causing heart palpitations. In this case, your doctor may recommend you wear a Holter or event monitor, which measures your heart’s electrical activity for 24 or 48 hours. You’ll also keep a notebook, recording when you feel heart palpitations symptoms such as lightheadedness, chest discomfort, and any other relevant information. If, for example, you experience palpitations after physical activity, you would note that.
A stress test is another way to diagnose the cause of heart palpitations symptoms and other problems. During a stress test, you’ll walk on a treadmill or ride a stationary bicycle until your heart displays signs of an irregular rhythm or other types of distress.
Causes of Palpitations
Not all heart palpitations symptoms are related to heart problems. Having one alcoholic drink too many might give you a racing heart. Simply feeling stressed or anxious can cause palpitations. Intense physical activity can also make it seem as though your heart is beating harder or faster. However, your heart may be beating normally or healthfully during exercise. It’s just that the activity may increase your heart rate to match the body’s demand for oxygenated blood to its muscles.
Certain medical conditions may also cause palpitations. These include anemia, thyroid disease, low blood pressure, and low blood sugar. If you have any of these issues and you experience heart palpitations, be sure to tell your doctor. They may indicate a change in your condition. Also, if you get dehydrated, you may also notice a change in your heartbeat.
But if your palpitations aren’t caused by mood, exercise, or a health condition unrelated to your heart, you may have a cardiac condition known as an arrhythmia.
One of the most common arrhythmias is a condition known as atrial fibrillation (Afib). If you have Afib, your heart’s upper chambers (atria) beat out of rhythm with your lower chambers (ventricles). The atria quiver erratically, so circulation throughout the body is compromised. Blood can also pool in the heart, possibly leading to blood clot formation and a higher risk of stroke.
Other types of arrhythmias include bradycardia, an abnormally slow heart rate, and tachycardia, an abnormally fast heart rate. There are other kinds of arrhythmias that cause heart palpitations symptoms. If you are diagnosed with any heart rhythm disturbance, you should work with an electrophysiologist, the type of cardiologist who specializes in the heart’s electrical system.
For many people, palpitations are harmless and innocent events that require no treatment. Their causes can be easily identified. If the cause is related to thyroid disease, low blood pressure or another non-cardiac reason, effective management of the underlying condition might cause the palpitations to cease.
And if you have an arrhythmia, treatment may start with medications. If drugs can’t control all your heart palpitations symptoms and other problems associated with the abnormal heart rhythm, interventions may be necessary. This often means a catheter procedure called an ablation, in which the tiny portion of heart tissue presumed to be the cause of the electrical disturbance is destroyed.
If you have had a heart attack or any type of heart disease, you’re at a higher risk for an arrhythmia. A preexisting heart condition also raises your risk of developing sudden cardiac arrest symptoms, such as palpitations and a sudden loss of pulse and consciousness. However, sudden cardiac arrest is unusual. If you have a type of arrhythmia known as ventricular fibrillation, in which the ventricles beat abnormally, your risk of sudden cardiac arrest is somewhat elevated.
Heart palpitations aren’t a condition by themselves. They are symptoms of a condition that ranges from harmless and momentary to serious—and one you may have to deal with for life. But the only way you’ll know for sure is to share your heart palpitations symptoms with your doctor and start working together to find the cause.
Originally published in June 2016 and updated.