Most heart palpitations last only a few seconds to a few minutes. The sensation of a skipped beat, flutter, or pounding heart is almost always brief and resolves on its own. How long yours last depends on what’s causing them, ranging from a single extra heartbeat that’s over in an instant to episodes of abnormal rhythm that can persist for hours.
A Single Extra Beat: Seconds or Less
The most common type of palpitation is a premature beat, either from the upper chambers (premature atrial contraction) or the lower chambers (premature ventricular contraction, or PVC). These feel like your heart “skipped” or “stopped for a second,” but what actually happened is the opposite: your heart fired an extra beat slightly early, then paused briefly while resetting to its normal rhythm. That pause is what you feel. The whole event takes one to two heartbeats and is over before you can finish thinking about it.
Almost everyone experiences premature beats. They’re generally harmless, even if the sensation is unsettling. You might notice a few in a row, especially after caffeine, poor sleep, or stress, but each individual skip still lasts only a moment.
Anxiety-Related Palpitations: Minutes
Palpitations triggered by anxiety or panic tend to start suddenly, feel intense, and end quickly. They usually resolve within a few minutes once the stressful situation passes or the acute wave of panic subsides. During a panic attack, your heart rate can spike significantly, and the pounding sensation may feel like it goes on longer than it actually does because your attention is locked onto it.
If palpitations happen frequently or don’t settle within a few minutes, they may not be anxiety-related, even if you feel anxious at the time. Anxiety and true arrhythmias can feel very similar, so the duration is one useful clue: brief and clearly tied to a stressful moment points toward anxiety, while episodes that persist regardless of your mental state warrant closer attention.
Sustained Fast Rhythms: Minutes to Hours
Some palpitations aren’t just extra beats but a sustained change in rhythm. Paroxysmal supraventricular tachycardia (SVT), one of the more common fast-rhythm conditions, causes your heart to race at 150 beats per minute or more. Episodes start and stop suddenly and can last anywhere from a few minutes to several hours. You may feel lightheaded, short of breath, or notice a fluttering in your chest or neck.
Atrial fibrillation, where the upper chambers of the heart beat chaotically, follows a different pattern. Paroxysmal episodes (those that come and go) can last minutes, hours, or up to several days before the heart returns to a normal rhythm on its own. Over time, episodes may become longer and more frequent.
What Affects How Long They Last
Several factors influence the duration and frequency of palpitations:
- Caffeine: Caffeine triggers PVCs and a general sense of palpitation by stimulating the heart. Its half-life in your body is typically four to five hours, though it can range from as short as 90 minutes to as long as nine hours depending on your genetics, medications (oral contraceptives slow its breakdown), and whether you smoke. Palpitations from a large coffee can linger as long as the caffeine is active in your system.
- Hormonal changes: Palpitations are common during perimenopause and menopause because declining estrogen levels affect heart rhythm regulation. These episodes tend to come and go over months or years, often alongside hot flashes, and individual episodes are typically brief.
- Dehydration and electrolytes: Low levels of potassium, magnesium, or general dehydration can make palpitations more frequent and longer-lasting. Correcting the imbalance usually stops them.
- Alcohol: Even moderate drinking can provoke palpitations that persist for hours, particularly in people prone to atrial fibrillation.
How to Stop an Episode Sooner
For sustained fast rhythms like SVT, vagal maneuvers can sometimes reset the heart to a normal pace. The most well-known is the Valsalva maneuver: lie on your back, take a deep breath, then bear down as if you’re trying to exhale through a blocked straw with your mouth and nose closed. Hold for 10 to 30 seconds. A modified version adds bringing your knees to your chest immediately afterward and holding that position for 30 to 45 seconds. These techniques work by stimulating the vagus nerve, which slows the heart rate. They have a 20% to 40% success rate for converting certain fast rhythms back to normal.
For isolated extra beats or anxiety-related palpitations, slow deep breathing, splashing cold water on your face, or simply changing your position (standing up if lying down, or vice versa) can help. Reducing caffeine, staying hydrated, and getting enough sleep are the most effective ways to lower how often episodes happen in the first place.
When Duration Signals Something Serious
Brief palpitations that come and go without other symptoms are rarely dangerous. But certain combinations raise the stakes. Palpitations that occur alongside chest pain, fainting, near-fainting, or significant shortness of breath are more likely to reflect a genuine arrhythmia and need prompt evaluation. The same applies to episodes that last more than a few minutes without an obvious trigger, happen with increasing frequency, or occur during exercise.
If your palpitations are hard to catch because they’re infrequent, your doctor may use a Holter monitor, which records your heart’s electrical activity continuously for 24 to 48 hours. For episodes that happen less often, an event monitor can be worn for several weeks or even a full month, capturing data only when you press a button or when the device detects an abnormal rhythm. The goal is to match what you’re feeling to what your heart is actually doing, which tells your doctor whether the rhythm is benign or needs treatment.