Heart Skipping a Beat: PVCs, PACs, and When It's Serious

What's Actually Happening When You Feel a "Skip"

What people describe as a skipped heartbeat is almost always a premature contraction — an extra heartbeat that fires earlier than expected, followed by a brief pause before the next normal beat, which can feel like a thump, flutter, or flip-flop sensation in the chest.

Premature ventricular contractions (PVCs) originate in the heart's lower chambers, while premature atrial contractions (PACs) originate in the upper chambers. Both produce a similar sensation and are generally considered in the same broad category of common, usually benign, extra beats.

Just How Common This Actually Is

Premature beats occur in the vast majority of people at some point, and studies using continuous heart monitoring have found that most people have at least occasional PVCs or PACs without ever noticing them, which suggests the sensation itself, when it is noticed, doesn't necessarily correlate with how often it's actually happening.

Some people are simply more sensitive to noticing these sensations than others, which is part of why two people with a similar number of premature beats on a monitor can have very different subjective experiences, one bothered frequently and the other never aware anything is happening.

Just How Common This Actually Is in practice.

What Commonly Triggers Premature Beats

Caffeine, alcohol, stress and anxiety, lack of sleep, and stimulant use are among the most commonly reported triggers for an increase in noticeable premature beats. Certain electrolyte imbalances, and some over-the-counter cold and allergy medications containing stimulants, can also contribute.

In some people, premature beats are more noticeable during rest, particularly lying down at night, likely because there are fewer other bodily sensations competing for attention, rather than because premature beats are actually happening more frequently at that time.

Why Most Cases Aren't Concerning

In someone with an otherwise structurally normal, healthy heart, occasional PVCs and PACs are generally considered benign, meaning they don't indicate an underlying serious heart problem and don't require treatment beyond addressing any clear triggers like excess caffeine or poor sleep.

This reassurance, though, is something a doctor confirms through appropriate evaluation rather than something to simply assume on your own, particularly for a first-time or new-feeling episode, since the same sensation can occasionally point toward something that does need attention, covered next.

Why Most Cases Aren't Concerning in practice.

When This Warrants a Doctor's Evaluation

A first-time occurrence, especially in someone over 40 or with cardiovascular risk factors, is generally worth a doctor's evaluation to establish a baseline and rule out anything more significant, even if the most likely outcome is a reassuring, benign finding.

Premature beats accompanied by chest pain, significant shortness of breath, dizziness, fainting, or a very high frequency of episodes are more concerning combinations that warrant prompt medical evaluation rather than being attributed to common benign triggers without being checked first.

How Doctors Actually Investigate This

An electrocardiogram (ECG) captures the heart's electrical activity at a single moment and can sometimes catch a premature beat directly, though because these episodes are often intermittent, a standard ECG can also come back completely normal if none happen to occur during the brief recording.

For a more complete picture, doctors often use a Holter monitor or a longer-wearing patch monitor, worn for anywhere from a day to a couple of weeks, to capture how frequently premature beats are actually occurring and confirm they aren't part of a more concerning, sustained rhythm problem like atrial fibrillation.

How Doctors Actually Investigate This in practice.

Why Ruling Out Atrial Fibrillation Matters

Atrial fibrillation (AFib), an irregular and often faster heart rhythm, is a genuinely more serious condition that carries its own distinct risks, including an increased stroke risk, and needs a different management approach entirely compared to occasional benign premature beats.

Because AFib can sometimes feel similar to frequent premature beats, especially to someone without a background in distinguishing the two by feel alone, appropriate monitoring is what actually differentiates them, rather than relying on the subjective sensation alone to draw a conclusion.

How This Plays Out for a Typical Patient

Consider someone in their 40s who starts noticing an occasional fluttering sensation in their chest, particularly in the evenings after a stressful day and a couple of cups of coffee earlier at work. Concerned, they see their doctor, who orders an ECG that happens to catch one of the premature beats directly on the recording, confirming it's a PVC originating from a benign location in the heart.

Given the clear connection to caffeine and stress, and a completely normal heart structure on further testing, the doctor recommends reducing caffeine intake and addressing stress rather than starting medication. Over the following weeks, cutting back on coffee noticeably reduces how often the sensation occurs, reinforcing the trigger-based explanation.

How This Is Managed Across Different Healthcare Settings

Approaches to evaluating premature beats are broadly similar across major cardiology guidelines internationally, generally emphasizing an initial ECG and risk-factor assessment, with extended monitoring reserved for more frequent, bothersome, or ambiguous cases rather than for every reported episode.

Access to extended cardiac monitoring technology like wearable patch monitors has expanded significantly in many healthcare systems in recent years, making it easier than it once was to get a clear picture of how frequently these episodes are actually occurring outside of a brief in-office visit.

Frequently Asked Questions