That sensation of your heart skipping, fluttering, or pausing is almost always caused by extra heartbeats called premature contractions. They’re among the most common heart rhythm irregularities, and in most people with a structurally normal heart, they’re harmless. But when they happen constantly, they deserve attention, both to rule out underlying problems and because a very high frequency of extra beats can, over time, weaken the heart muscle.
What’s Actually Happening in Your Chest
Your heart isn’t truly skipping a beat. An electrical signal fires early from somewhere other than its usual starting point, causing a premature contraction. This extra beat is followed by a brief pause as the heart resets its rhythm. That pause makes the next normal beat more forceful than usual, and it’s this stronger-than-normal thump you feel. The combination of the early beat and the forceful one that follows creates the “skip” sensation.
These premature beats come in two varieties. Premature atrial contractions (PACs) originate in the upper chambers of the heart, while premature ventricular contractions (PVCs) come from the lower chambers. PVCs tend to produce a more noticeable sensation because the lower chambers do the heavy lifting of pumping blood. Both types are extremely common. Most adults experience some premature beats every day without ever noticing them.
Why They Might Be Happening So Often
When premature beats shift from occasional to constant, there’s usually a trigger amplifying them. Stress and anxiety are among the most powerful. Anxiety activates your body’s fight-or-flight response, flooding your system with adrenaline and speeding up your heart rate. That heightened state of nervous system activation makes premature beats both more frequent and more noticeable. For some people, the awareness of skipped beats creates more anxiety, which triggers more skipped beats, locking them into a frustrating cycle.
Caffeine has a complicated relationship with palpitations. Research from Harvard Health suggests caffeine is unlikely to trigger palpitations in people with healthy hearts, but for those who already have rhythm disturbances, even moderate amounts can make the problem worse. Alcohol, nicotine, decongestants, and stimulant medications can all have similar effects.
Low levels of potassium and magnesium destabilize the heart’s electrical system. These minerals regulate the tiny electrical currents that coordinate each heartbeat. When levels drop, the heart becomes more prone to firing off premature signals. Dehydration, heavy sweating, poor diet, and certain medications (particularly diuretics) can deplete both minerals. Sleep deprivation and hormonal shifts, including those around menstruation and menopause, are also well-documented triggers.
When Frequent Means Too Frequent
Everyone has some premature beats. The question is how many. Doctors measure this as “PVC burden,” the percentage of your total heartbeats that are premature. A normal heart beats roughly 100,000 times per day. Clinical guidelines define frequent PVCs as more than 30 per hour or at least one on a standard electrocardiogram.
The threshold that raises concern is generally around 10% of total heartbeats, meaning roughly 10,000 or more premature beats per day. Above that level, doctors typically want to check how well the heart is pumping. At burdens above 15% to 25%, some patients develop a weakening of the heart muscle called PVC-induced cardiomyopathy. The encouraging part: this type of heart muscle weakening is often reversible once the premature beats are brought under control.
For people with a low PVC burden and a structurally normal heart, reassurance that the condition is benign is often the only “treatment” needed. But if premature beats are suspected to be frequent enough to affect heart function over time, periodic follow-up with imaging to check the heart’s pumping strength is warranted.
How Doctors Figure Out What’s Going On
A standard electrocardiogram captures about 10 seconds of heart activity, which may or may not catch a premature beat. If your skipped beats come and go, a Holter monitor is the next step. This portable device records every heartbeat over 24 to 48 hours while you go about your normal routine, giving doctors an accurate count of how many premature beats you’re having and where they originate.
If your symptoms are less predictable, occurring less than once a week, an event recorder may be more useful. You wear it for up to 30 days and press a button when you feel the skipping sensation. This links your symptoms to whatever the heart is doing electrically at that moment. An echocardiogram, which uses ultrasound to create a moving picture of your heart, may also be ordered to check for structural problems like valve issues or weakened heart muscle that could be driving the rhythm disturbance.
Blood work to check potassium, magnesium, and thyroid function is standard. An overactive thyroid is a well-known cause of persistent palpitations that’s easily treated once identified.
Managing Constant Skipped Beats
For many people, the most effective first step is identifying and removing triggers. Cutting back on caffeine, alcohol, and stimulants, improving sleep, and addressing chronic stress can significantly reduce how often premature beats occur. Correcting electrolyte deficiencies, particularly magnesium and potassium, can quiet an irritable heart within days.
When lifestyle changes aren’t enough and symptoms are disruptive, medications that slow the heart rate or reduce its sensitivity to premature electrical signals are an option. These work well for many patients but come with side effects that make them a poor choice for people whose symptoms are merely annoying rather than debilitating.
For patients with a very high PVC burden causing heart muscle weakening, or for those who can’t tolerate medication, catheter ablation is a more definitive treatment. A thin wire is guided to the spot in the heart generating the extra signals, and that small area of tissue is destroyed with heat or cold. Success rates are high, particularly when the premature beats originate from a single location.
Symptoms That Need Immediate Attention
Most skipped beats, even frequent ones, are not emergencies. But certain accompanying symptoms change the picture. Sudden loss of consciousness or collapse requires an immediate trip to the emergency department. The same applies if your heart is racing uncontrollably and you feel dizzy or lightheaded at the same time, or if the skipped beats come with chest pain or pressure. These combinations can signal a more dangerous rhythm disturbance that needs rapid evaluation.
Persistent skipped beats paired with new shortness of breath during activities that didn’t previously wind you could indicate the premature beats are starting to affect your heart’s pumping ability. This isn’t an emergency room situation, but it’s worth getting checked within days rather than weeks.