That fluttering, lurching sensation in your chest is almost certainly a premature heartbeat, and it’s one of the most common cardiac experiences in healthy people. These extra beats happen when a small area of your heart fires an electrical signal slightly ahead of schedule, causing the heart to contract a fraction of a second too early. The beat itself is often too weak to feel, but the pause that follows and the forceful “catch-up” beat afterward create that unmistakable skipping or flopping sensation.
What Actually Happens Inside Your Heart
Your heart runs on a precise electrical system. A cluster of cells at the top acts as a natural pacemaker, sending a signal that travels down through the chambers in a coordinated sequence. A premature beat occurs when a rogue electrical impulse fires from somewhere else in the heart before the pacemaker’s next scheduled signal. If the early impulse comes from one of the upper chambers, it’s called a premature atrial contraction (PAC). If it comes from a lower chamber, it’s a premature ventricular contraction (PVC).
Either way, the heart contracts before it has fully filled with blood, so that beat pumps less than usual. Your heart’s electrical system then resets, creating a brief pause before the next normal beat. During that pause, the chambers fill with more blood than usual, so the following contraction is stronger than normal. That combination of a weak beat, a pause, and a thump is what you feel as a “skip.”
How Common Premature Beats Are
Extremely common. A community study of healthy adults aged 25 to 41 found at least one PVC on 24-hour heart monitoring in 69% of participants. In an older population (average age 75), researchers using extended patch monitors detected at least one PVC in 99.5% of people. In other words, nearly everyone’s heart does this. Population-wide estimates put the prevalence of PVCs at 3% to 20% when measured on a standard short electrocardiogram, but the number climbs dramatically the longer you monitor.
Most people have only a handful per day. In one large American study, PVCs made up a median of just 0.011% of all heartbeats over 24 hours. That works out to roughly 10 extra beats in a full day of 100,000 heartbeats. Some people have far more and still have structurally normal hearts.
Why You Notice Them More at Certain Times
Premature beats happen all day, but you’re most likely to feel them when you’re lying still, especially on your left side at night, because your heart sits closer to the chest wall and there are fewer distractions. Stress and anxiety are major amplifiers. When your body releases adrenaline, the hormone acts directly on receptors in heart cells that increase heart rate and excitability. This makes rogue electrical impulses more likely to fire and makes each beat feel more forceful.
Common triggers include:
- Caffeine in large amounts. Moderate coffee intake (a cup or two) doesn’t appear to increase risk for most people, but high-dose energy drinks are a different story. If you notice a pattern after your third or fourth cup, cutting back is a reasonable experiment.
- Alcohol. Even moderate drinking can irritate the heart’s electrical system. Cardiologists often recommend no more than three alcoholic drinks per week for people prone to rhythm disturbances.
- Poor sleep and fatigue. Sleep deprivation raises baseline stress hormones, priming the heart for extra beats.
- Dehydration and electrolyte shifts. Low magnesium or potassium can destabilize the electrical signals that keep your heart rhythm steady.
- Nicotine. Like caffeine, nicotine is a stimulant that increases heart cell excitability.
Hormonal changes during menstruation, pregnancy, or perimenopause can also increase the frequency of premature beats, which is why some people notice them for the first time during these transitions.
When Skipped Beats Are Worth Investigating
Most premature beats are harmless, but certain patterns deserve medical attention. The sensation itself isn’t the concern. What matters is the company it keeps.
Seek emergency care if your skipped beats come with sudden collapse or loss of consciousness, chest pain, or a racing heart paired with dizziness or lightheadedness. These combinations can signal a more serious arrhythmia that needs immediate evaluation.
Outside of emergencies, it’s worth booking an appointment if you’re having frequent episodes (multiple times a day, most days), if the sensation lasts more than a few seconds at a time, or if you feel short of breath during episodes. A family history of sudden cardiac death at a young age or inherited heart conditions is also a red flag that warrants testing, even if your symptoms feel mild.
How Doctors Evaluate Skipped Beats
The goal of testing is to capture the irregular beats on a recording so a doctor can see exactly what your heart is doing electrically. A standard electrocardiogram (ECG) takes a 10-second snapshot, which may or may not catch a premature beat if yours are infrequent.
For a more complete picture, you may be asked to wear a Holter monitor, a small portable device that records every heartbeat over 24 to 48 hours. If your symptoms are less frequent than that, an event monitor extends the recording window to several weeks or even a full month. These longer monitors are particularly useful when skipped beats happen only a few times a week, since a short recording might miss them entirely. In some cases, an echocardiogram (an ultrasound of the heart) is added to confirm that the heart’s structure and pumping function are normal.
Managing the Sensation
If testing confirms benign premature beats with a normal heart structure, the main treatment is reassurance and trigger management. For many people, simply understanding that the sensation is not dangerous reduces the anxiety that was making it worse, which in turn reduces the frequency of the extra beats.
Practical steps that often help: cut back on caffeine and alcohol, prioritize consistent sleep, stay well hydrated, and find ways to lower chronic stress. Regular aerobic exercise tends to reduce premature beats over time, though you may notice more of them during the cool-down period right after a workout when your body is still flushed with adrenaline.
When premature beats are frequent enough to be genuinely disruptive, doctors sometimes prescribe beta blockers. These medications work by blocking adrenaline’s effect on heart cells, which slows the heart rate and makes it less reactive to stress hormones. They don’t eliminate premature beats entirely, but they can reduce both the frequency and the intensity of the sensation. For the small percentage of people whose PVCs are very frequent (typically over 15% to 20% of all heartbeats) and begin to weaken heart function, a targeted procedure called catheter ablation can eliminate the source of the rogue electrical signals.