Most heart palpitations are harmless and stop on their own within seconds to minutes. That fluttering, pounding, or skipped-beat sensation in your chest is usually caused by a temporary trigger like stress, caffeine, or poor sleep. Still, knowing how to respond in the moment, what’s triggering them, and when they signal something serious can save you a lot of anxiety.
What to Do in the Moment
When palpitations hit, the fastest way to reset your heart rhythm is through vagal maneuvers. These are simple physical techniques that stimulate your vagus nerve, which runs from your brain to your abdomen and helps regulate heart rate. They work by activating your body’s “brake pedal” for the heart, slowing electrical signals and often stopping the irregular rhythm within seconds.
The most well-known technique is the Valsalva maneuver. Lie on your back, take a deep breath, then try to exhale forcefully with your nose and mouth closed for 10 to 30 seconds. It should feel like you’re trying to push air through a blocked straw. A modified version works even better: do the same breath-hold while sitting up, then immediately lie back and pull your knees to your chest, holding that position for 30 to 45 seconds.
The diving reflex is another reliable option. Take several deep breaths, hold one, and quickly submerge your entire face in a bowl of ice water for as long as you can manage. If that sounds unpleasant, pressing a bag of ice or an ice-cold wet towel against your face triggers the same reflex. The sudden cold mimics diving into water and prompts your nervous system to slow your heart rate.
Simpler options include forceful coughing, which can jolt the rhythm back to normal, or lying on your back and folding your lower body toward your face (feet past your head) while straining for 20 to 30 seconds. Even a 30-second handstand can work. Try whichever technique feels most manageable. If one doesn’t work after a couple of attempts, move on to another.
Common Triggers Worth Tracking
Palpitations rarely come from nowhere. The most common triggers are substances that rev up your nervous system or alter your heart’s electrical activity. Alcohol is a major one. Studies show that alcohol in the bloodstream makes the heart more susceptible to rhythm disturbances, and for people prone to palpitations, limiting intake to no more than three drinks per week is a common recommendation. Caffeine, surprisingly, gets a partial pass. Research including randomized trials has found that “usual amounts” of coffee don’t increase the risk of arrhythmia episodes for most people, though energy drinks with concentrated caffeine doses are a different story. Two cups of coffee in the morning is generally considered safe, but everyone’s threshold is different.
Beyond substances, the most overlooked trigger is your nervous system itself. Anxiety activates your body’s fight-or-flight response, which directly increases heart rate. Your autonomic nervous system, the same system that controls breathing and digestion, ramps up when you feel uneasy or stressed. The resulting palpitations are real, not imagined, but they’re driven by adrenaline rather than a structural heart problem. This creates a frustrating cycle: you feel a palpitation, which causes anxiety, which triggers more palpitations.
Other common triggers include dehydration, sleep deprivation, nicotine, certain cold medications containing stimulants, and hormonal shifts (particularly during menstruation, pregnancy, or perimenopause). Keeping a simple log of when palpitations occur, what you ate or drank beforehand, and your stress level can reveal patterns that are surprisingly easy to fix once you spot them.
When Palpitations Are an Emergency
The vast majority of palpitations are benign, but certain combinations of symptoms demand immediate attention. Get to an emergency room if palpitations come with chest pain or pressure, dizziness, lightheadedness, or fainting. Fainting during palpitations is particularly concerning because it’s more likely to be associated with dangerous heart rhythms like ventricular tachycardia, where the lower chambers of the heart fire too rapidly to pump blood effectively.
Palpitations that last longer than a few minutes, happen frequently without an obvious trigger, or feel like a sustained rapid heartbeat rather than occasional skipped beats also warrant medical evaluation, even if you don’t have the emergency symptoms listed above. The distinction matters: a few seconds of fluttering after your third espresso is very different from a 20-minute episode of rapid pounding that leaves you breathless.
How Doctors Evaluate Palpitations
The standard starting point is a 12-lead ECG, which captures your heart’s electrical activity in about 10 seconds. The challenge is that palpitations are often intermittent, so a normal ECG in the office doesn’t rule everything out. If your doctor wants to catch what’s happening during an actual episode, they’ll typically send you home with a portable monitor.
A Holter monitor is a small device you wear that records your heart rhythm continuously for 24 to 48 hours. It’s ideal when palpitations happen at least once a day. If your episodes are less frequent, an event monitor is more practical. Unlike the Holter, it doesn’t record continuously. Instead, you activate it when you feel symptoms, and it captures the rhythm at that moment. Some event monitors can be worn for weeks, increasing the odds of catching an episode.
Your doctor will use the results of this initial workup, combined with your symptom history and physical exam, to decide whether you need further testing like an echocardiogram (an ultrasound of your heart) or a referral to a cardiologist for electrophysiology testing.
Using a Smartwatch for Tracking
Consumer smartwatches with ECG features have become surprisingly accurate screening tools. A systematic review and meta-analysis published in the Journal of Medical Internet Research found that smartwatches detected cardiac arrhythmias with an overall sensitivity of 100% and specificity of 95%. The accuracy across studies averaged 97%. That said, individual device performance varied widely, with sensitivity as low as 25% in some studies and specificity dropping to 68% in others, depending on the device and the type of arrhythmia.
What this means practically: a smartwatch is excellent for logging episodes and providing your doctor with data they can actually review. If your watch flags an irregular rhythm, take it seriously and share the reading at your next appointment. But a clean reading during one check doesn’t guarantee everything is fine, especially if you’re symptomatic. Think of wearables as a supplement to medical monitoring, not a replacement.
Lifestyle Changes That Reduce Episodes
For most people with benign palpitations, the “treatment” is identifying and managing triggers. Cutting back on alcohol, staying hydrated, improving sleep habits, and managing stress can reduce episodes dramatically without medication. Regular aerobic exercise also helps by improving your heart’s overall efficiency and lowering resting heart rate over time, though intense exercise can itself trigger palpitations in some people, so building up gradually matters.
Stress and anxiety management deserves special attention because the fight-or-flight mechanism is such a potent trigger. Techniques that activate your parasympathetic nervous system (the calming counterpart to fight-or-flight) can break the palpitation-anxiety cycle. Slow, deep breathing with a longer exhale than inhale, progressive muscle relaxation, and regular meditation practice all lower baseline nervous system activation. These aren’t just relaxation tips. They directly influence the same vagus nerve pathway that makes vagal maneuvers work in the moment.
Medical Treatment for Persistent Palpitations
When lifestyle changes aren’t enough, or when monitoring reveals a specific arrhythmia, medication is the next step. Beta blockers are the most commonly prescribed option. They work by blocking the effects of adrenaline on the heart, slowing heart rate and reducing the force of contractions. Most people notice a significant reduction in the frequency and intensity of episodes.
If a specific arrhythmia is identified, like supraventricular tachycardia (a common cause of sudden rapid heartbeat in otherwise healthy people), a procedure called catheter ablation may be offered. This is a one-time treatment where a specialist uses a thin wire threaded through a blood vessel to destroy the tiny area of heart tissue causing the abnormal electrical signal. Success rates are high, and for many people it eliminates palpitations permanently.
For palpitations caused by premature beats, the extra heartbeats that feel like your heart “skipped,” treatment often isn’t necessary once testing confirms they’re benign. Knowing that the sensation is harmless, even though it feels alarming, is itself therapeutic. Many people find that once the anxiety about the palpitation disappears, the palpitations themselves become less frequent and less noticeable.