Most heart palpitations are harmless and pass on their own within seconds to minutes. In a study of 190 patients who reported palpitations, only about 43 percent had a cardiac cause, while 31 percent were triggered by anxiety or panic, and 16 percent had no identifiable cause at all. That said, knowing what to do in the moment, what triggers to avoid, and when to take palpitations seriously can make a real difference in how often they happen and how much they worry you.
How to Stop Palpitations in the Moment
When your heart starts fluttering, racing, or pounding, certain physical techniques can help reset its rhythm. These work by stimulating the vagus nerve, a long nerve that runs from your brain to your abdomen and helps regulate your heart rate. You can try these at home.
The Valsalva maneuver is one of the most effective options. Lie on your back, take a deep breath, then try to exhale forcefully with your mouth and nose closed for 10 to 30 seconds. It should feel like you’re trying to blow air through a blocked straw. A modified version, where you then quickly bring your knees to your chest and hold for 30 to 45 seconds, tends to work even better.
The diving reflex is another reliable technique. Take a few deep breaths, hold, and submerge your face in a bowl of ice water for as long as you comfortably can. If that sounds extreme, pressing a bag of ice or an ice-cold wet towel against your face triggers the same reflex. The sudden cold signals your nervous system to slow your heart rate.
Simpler options include forceful coughing, which creates pressure changes in your chest that can interrupt a fast rhythm. Bearing down as if you’re having a bowel movement works through a similar mechanism. These are worth trying if ice water isn’t handy.
Common Triggers Worth Tracking
Palpitations rarely come out of nowhere. Identifying your personal triggers is one of the most useful things you can do to reduce how often they occur.
Caffeine and stimulants are among the most common culprits. Coffee, energy drinks, pre-workout supplements, and even large amounts of chocolate can push your heart rate up. Nicotine does the same. If palpitations are bothering you regularly, cutting back on these for a few weeks is a straightforward first experiment.
Dehydration is an underappreciated trigger. When your body is low on fluids, blood volume drops, and your heart compensates by beating faster and harder to keep circulation going. This alone can produce palpitations, especially during light exercise. Dehydration also disrupts your electrolyte balance, and electrolytes are essential to the electrical signals that keep your heartbeat steady. An imbalance of too many or too few can provoke irregular rhythms. Drinking enough water throughout the day, and replacing electrolytes after heavy sweating, is a simple but genuinely effective preventive step.
Certain medications can also be responsible. Inhaled bronchodilators used for asthma, oral decongestants found in cold and sinus medications, and stimulant medications prescribed for ADHD are all linked to heart rhythm changes. If your palpitations started around the same time you began a new medication or increased a dose, that connection is worth discussing with your prescriber.
Alcohol is another well-documented trigger. Even moderate drinking can provoke episodes in some people, and binge drinking substantially raises the risk of a type of irregular rhythm called atrial fibrillation.
Anxiety-Related Palpitations
Between 15 and 31 percent of people who see a doctor for palpitations turn out to have panic disorder as the underlying cause. Anxiety-driven palpitations have a distinct pattern: they tend to start suddenly, often during or right after a stressful moment, and resolve within a few minutes once the stress passes. If your episodes fit that description and don’t come with chest pain, fainting, or prolonged dizziness, anxiety is a likely contributor.
This doesn’t mean the sensation isn’t real. Your body’s stress response genuinely speeds up your heart and can trigger extra beats. But it does mean the solution looks different. Slow diaphragmatic breathing, where you inhale for four counts and exhale for six to eight, directly activates the same vagus nerve pathway that slows heart rate. Regular exercise, consistent sleep, and reducing caffeine all lower your baseline stress response over time, which makes anxiety-related episodes less frequent.
The tricky part is that palpitations themselves cause anxiety, which makes the palpitations worse. Breaking that cycle often matters more than any single technique. If anxiety-related palpitations are disrupting your daily life, cognitive behavioral therapy has a strong track record for this specific pattern.
Nutrition and Electrolyte Balance
Your heart’s rhythm depends on a precise balance of electrolytes, particularly potassium and magnesium. Low potassium is one of the more common nutritional causes of palpitations and irregular heartbeats. Symptoms of deficiency can include skipped beats, muscle cramps, weakness, and fatigue. Severe potassium deficiency can lead to dangerous arrhythmias.
You don’t necessarily need supplements. Potassium-rich foods include bananas, potatoes, spinach, beans, and avocados. Magnesium is found in nuts, seeds, dark leafy greens, and whole grains. Where people run into trouble is when they combine a diet low in these minerals with heavy sweating, diuretic medications, or excessive alcohol, all of which deplete electrolytes faster. If you suspect a deficiency, a simple blood test can confirm it.
When Palpitations Need Medical Attention
Most palpitations are benign, but certain patterns warrant prompt evaluation. Seek emergency care if palpitations come with chest pain or pressure, difficulty breathing, dizziness or confusion, fainting or near-fainting, or unusual sudden fatigue. These combinations can signal a serious arrhythmia or another cardiac problem that needs immediate treatment.
Even without emergency symptoms, you should see a doctor if your palpitations are lasting longer than a few minutes at a time, happening frequently, or getting worse over time. Palpitations that occur during physical exertion rather than at rest also deserve attention, as do episodes accompanied by significant swelling in your legs or feet.
What to Expect at the Doctor
The standard first step is an electrocardiogram (ECG), a painless test where sticky patches on your chest record your heart’s electrical activity. It takes about 10 minutes and can detect abnormal rhythms, but it only captures what’s happening in that moment. Since palpitations come and go, a normal ECG doesn’t rule everything out.
If the ECG is normal, your doctor may have you wear a Holter monitor, a portable device that continuously records your heart rhythm for 24 hours or longer while you go about your day. For palpitations that happen less than once a week, an event recorder is more practical. You wear it for up to 30 days and press a button when symptoms occur, so it captures the rhythm during an actual episode. This is often the test that provides the clearest answer.
An echocardiogram, which uses ultrasound to create a moving image of your heart, may be ordered if your doctor suspects a structural issue like a valve problem. It’s noninvasive and painless. Together, these tests can determine whether your palpitations are caused by a rhythm disorder that needs treatment or a benign pattern that simply needs monitoring and lifestyle adjustments.