An irregular heartbeat typically feels like a fluttering, pounding, or racing sensation in your chest, or like your heart skipped a beat entirely. Some people notice it immediately, while others have no symptoms at all and only discover the problem during a routine checkup. The good news is that you can check for basic irregularities at home with nothing more than two fingers and a clock.
What an Irregular Heartbeat Feels Like
The sensations vary depending on the type of irregularity, but most people describe one or more of these feelings: a sudden flutter in the chest, a noticeable pause followed by a strong thump, a racing heart that starts or stops abruptly, or the distinct sense that your heart “skipped” a beat. That skipped-beat feeling is often a premature heartbeat, where an extra contraction happens slightly early. The pause afterward makes the next normal beat feel unusually forceful because the heart has had a moment longer to fill with blood.
Not all irregular heartbeats produce symptoms you can feel. Some people only notice them during quiet moments, like lying in bed at night, when there’s less distraction. Others experience them during or after physical activity. Pay attention to whether the sensation is a brief, isolated skip (which is extremely common and usually harmless) or a sustained period of racing, fluttering, or chaotic rhythm lasting minutes or longer.
How to Check Your Pulse at Home
The simplest way to detect an irregular rhythm is to check your own pulse. Sit down, rest for a few minutes, and turn one palm face up. Place the tips of your index and middle fingers on the inside of your opposite wrist, in the groove between the wrist bone and the tendon on the thumb side. Press gently until you feel each beat. Pushing too hard will actually block blood flow and make it harder to feel.
Count for a full 60 seconds while watching a clock. A normal resting heart rate for most adults falls between 60 and 100 beats per minute, though well-trained athletes can sit comfortably in the 40s or 50s. What matters just as much as the number is the rhythm itself. Tap along with each beat and notice whether the spacing feels even or erratic. A healthy heart keeps a steady tempo, like a metronome. If you feel consistent gaps, clusters of fast beats, or a chaotic pattern with no predictable spacing, that points toward an irregular rhythm worth investigating.
You can also check at your neck. Place two fingers in the groove alongside your windpipe to feel your carotid pulse. Only press on one side at a time, as pressing both carotid arteries simultaneously can make you dizzy or faint. For the most consistent readings, take your pulse at the same time each day.
Smartwatches and Heart Rate Monitors
Consumer wearables have become surprisingly accurate at flagging irregular rhythms. A systematic review of wearable ECG devices found that sensitivity for detecting atrial fibrillation ranged from 83% to 100%, with specificity between 79% and 100%. The Apple Watch, for example, achieved around 93 to 95% sensitivity and up to 100% specificity when users were allowed to take repeated recordings. Other devices like KardiaMobile and FibriCheck performed similarly well in controlled studies, with 100% sensitivity and specificity above 96%.
There’s a catch. When poor-quality or unreadable recordings were counted as errors, accuracy dropped significantly, with sensitivity falling to around 66% in one study. That means a single inconclusive reading on your wrist doesn’t rule anything out. If your watch flags an irregular rhythm, take it seriously. If it doesn’t flag anything but you’re still feeling symptoms, that’s also worth pursuing. These devices are useful screening tools, not replacements for medical-grade testing.
Common Types of Irregular Heartbeats
The term “irregular heartbeat” covers a range of conditions, and they don’t all carry the same level of concern.
Premature beats are the most common type. These are early contractions in either the upper or lower chambers of the heart. They feel like a skip or a sudden thump and are usually isolated events. Most people experience them occasionally, and they rarely need treatment.
Atrial fibrillation is a more serious rhythm disorder where the upper chambers of the heart quiver chaotically instead of contracting in a coordinated way. It produces a sustained irregular pulse that can last minutes, hours, or become permanent. People with atrial fibrillation often describe a fluttery, disorganized sensation in the chest alongside fatigue or shortness of breath. It increases stroke risk and typically requires ongoing management.
A heart rate consistently above 100 beats per minute at rest (tachycardia) or below 60 in a non-athlete (bradycardia) can also signal a rhythm problem, especially when paired with dizziness, fatigue, or fainting.
Common Triggers That Cause Temporary Irregularities
Before assuming the worst, consider whether something in your daily routine is provoking the sensation. Caffeine, alcohol, dehydration, and high levels of stress or anxiety are among the most common triggers for temporary heart rhythm disturbances. Foods high in fat, sugar, or carbohydrates can also cause palpitations after eating. Nasal decongestants containing pseudoephedrine are a frequently overlooked culprit, as are smoking and tobacco use. Hormonal shifts during pregnancy or menopause can trigger episodes as well.
If you notice palpitations only after your third cup of coffee or during a stressful week at work, the irregularity may resolve once the trigger does. Tracking when episodes happen, what you ate or drank beforehand, and how long they last gives you useful information to share if you do end up seeing a doctor.
How Doctors Confirm an Irregular Heartbeat
The challenge with arrhythmias is that they don’t always show up on demand. A standard electrocardiogram (EKG) captures your heart’s electrical activity for about 10 seconds. If your rhythm happens to be normal during that window, the test looks clean even if you’ve been having episodes all week.
That’s where longer monitoring comes in. A Holter monitor is essentially a portable EKG you wear for 24 hours or more. It records continuously, giving your doctor a complete “movie” of your heart’s electrical activity instead of a brief snapshot. If your episodes are less frequent, you may be given an event monitor that you wear for weeks and activate when symptoms occur.
For irregularities that seem tied to physical exertion, a stress test has you walk on a treadmill or ride a stationary bike while your heart is monitored. The goal is to provoke the arrhythmia in a controlled setting so it can be captured and identified. In rare cases where standard tests aren’t enough, doctors can thread thin electrode catheters into the heart through a vein to map its electrical pathways directly. This is done under local anesthesia and can both diagnose and sometimes treat the problem in the same session.
Symptoms That Need Immediate Attention
Most isolated skipped beats or brief flutters are not emergencies. But a fast or irregular heartbeat becomes urgent when it’s accompanied by chest pain, shortness of breath, sweating, fainting or near-fainting, sudden dizziness, a severe headache, weakness or numbness on one side of the face or body, blurred vision, or confusion. These combinations can signal a stroke or a dangerous cardiac event. If your resting heart rate drops below 35 to 40 beats per minute or exceeds 100 and you’re experiencing any of those symptoms, that warrants emergency care.