Your heart skips a beat — here's what that actually means
A palpitation is simply your heart drawing attention to itself. The heart beats roughly 100,000 times a day, almost entirely below the threshold of your awareness. When you suddenly feel it — a thump, a flutter, a momentary racing, a sensation that it "skipped" — it usually means one of two things: either a premature electrical beat fired early (a PAC or PVC, both extremely common), or the heart's normal rhythm temporarily changed pace. Neither of these is inherently dangerous, and in the vast majority of people with no underlying heart disease, they require no treatment whatsoever.
What makes palpitations more common than most people realise is how many ordinary things can trigger them. Caffeine is the classic culprit — even in moderate amounts it sensitises the cardiac conduction system. But dehydration, low magnesium, disrupted sleep, alcohol, high stress, thyroid imbalance, anaemia, and simply lying quietly in a dark room (which makes you hyperaware of your own body) can all produce the same unsettling sensation. For women, hormonal fluctuations around the menstrual cycle or perimenopause are a particularly underappreciated trigger.
The mechanics of a "skipped beat" are worth understanding because they defuse a lot of anxiety. What most people feel as a skip is actually a premature beat followed by a compensatory pause — the heart resets itself and then beats with extra force to catch up. That forceful beat is what you feel so dramatically. The heart hasn't actually stopped; it fired slightly early and then corrected. A 2021 review in Heart Rhythm found that PVCs (premature ventricular contractions) occur in up to 75% of healthy people who undergo 24-hour heart monitoring — meaning they are almost universal, just rarely noticed.
Palpitations aren't all the same — the pattern matters
Different people experience palpitations in different ways, and understanding your particular pattern is the most useful clue to what's causing them.
Most palpitations are harmless — but a small number aren't, and the difference is knowable
The good news is that context does most of the diagnostic work here. In a young, otherwise healthy person with no history of heart disease, palpitations that last a few seconds, come and go, and carry no other symptoms are almost certainly benign ectopic beats or a stress response. Studies consistently show that the vast majority of people referred for cardiac investigation of palpitations are given the all-clear. The anxiety about the palpitations often causes more harm — physiologically and psychologically — than the palpitations themselves.
The concerning exceptions are when palpitations are sustained (lasting more than a few minutes), accompanied by dizziness, fainting, chest pain, or breathlessness, occur during exercise rather than at rest, or feel like a rapid fluttering in the upper chest that comes on without warning in people over 50. These patterns can indicate atrial fibrillation (AF), supraventricular tachycardia (SVT), or, more rarely, ventricular arrhythmias — conditions that are treatable but need to be caught. The critical error most people make is either panicking needlessly about harmless ectopics, or dismissing sustained irregular rhythms as "just stress."
Atrial fibrillation — the most common heart rhythm disorder — affects approximately 37 million people worldwide and is a leading cause of stroke, yet it is frequently asymptomatic or mistaken for harmless palpitations. A 2020 study in The Lancet found that opportunistic pulse checks and single-lead ECG screening in people over 65 significantly increased AF detection and prevented strokes. If your palpitations feel irregular (not just fast) and last more than a few minutes, a simple ECG — which takes under five minutes — is worth asking for.
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What others have experienced
214 community experiences-
RK
I had these hard thumps in my chest every evening for about two months and convinced myself something was seriously wrong. Wore a Holter monitor for 48 hours — turned out to be frequent PVCs, totally benign. The cardiologist said cutting back caffeine and adding magnesium glycinate made a real difference for a lot of his patients, and honestly within three weeks of trying that the episodes went from daily to maybe once a week. Still unsettling when they happen but I'm no longer terrified.
47 found this helpful -
DM
Mine turned out to be SVT — supraventricular tachycardia. I'd had these episodes where my heart would suddenly go to about 180bpm for 30 seconds and then stop dead. I'd had it for years and always assumed it was anxiety. A cardiologist caught it on an event monitor and I've since had an ablation which fixed it completely. I wish I hadn't waited so long to get it checked — it was a simple day procedure. The key for me was that it was sudden-onset rapid rhythm, not just skips.
63 found this helpful -
ST
I'm perimenopausal and had no idea how much that could affect your heart rhythm until I started researching it. The palpitations were worst in the week before my period and sometimes woke me up at night. My GP checked my thyroid (normal) and iron (mildly low), and I started an iron supplement. The nighttime episodes basically stopped within a month. I still get occasional ones but they don't bother me the way they did once I understood what was driving them.
38 found this helpful
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