Most heart palpitations are harmless and pass within seconds or minutes, but certain patterns signal that you need medical attention. The short answer: if your palpitations last longer than a few minutes, come with chest pain or fainting, or push your heart rate above 110 beats per minute, it’s time to get evaluated. Below is a more detailed breakdown to help you sort the “mention it at your next checkup” situations from the “call 911” ones.
Signs You Need Emergency Care
Some combinations of symptoms suggest a potentially dangerous heart rhythm or cardiac event. Call 911 if your palpitations happen alongside any of the following:
- Chest pain or pressure that doesn’t ease within a few minutes of rest
- Fainting or near-fainting, especially if it comes on suddenly
- Severe shortness of breath that makes it hard to speak or move
- A resting heart rate below 35 to 40 bpm or above 100 bpm paired with dizziness, chest tightness, or trouble breathing
These red flags don’t automatically mean you’re having a heart attack, but they need to be ruled out in an emergency setting where monitoring and imaging are available. Don’t wait to see if they resolve on their own.
When to Call Your Doctor’s Office
Not every episode of palpitations warrants a trip to the ER, but some patterns deserve a phone call or an appointment sooner rather than later. A good rule of thumb from the Cleveland Clinic: palpitations that continue for an hour or more, even without other symptoms, should be evaluated further.
Other situations that call for a non-emergency appointment:
- Your palpitations keep coming back over days or weeks, even after cutting common triggers like caffeine or alcohol
- You notice your resting heart rate consistently sits above 100 bpm (a normal range is 60 to 100)
- A heart rate above 110 bpm during palpitations can be a sign of an arrhythmia worth investigating
- You’re experiencing palpitations for the first time at an older age
- You feel lightheaded, unusually tired, or short of breath during episodes, even mildly
If your palpitations are brief, occasional, and you can tie them to a clear trigger like a stressful meeting or your third cup of coffee, a mention to your doctor at your next routine checkup is usually sufficient.
Conditions That Raise the Stakes
Palpitations carry more clinical weight if you already have certain health conditions. Existing heart disease, including past heart attacks, cardiomyopathy, or congenital heart defects, makes any new rhythm disturbance more likely to be a true arrhythmia rather than a harmless skip. The same applies if you have heart failure, heart inflammation, or a history of heart valve problems.
Beyond the heart itself, several other conditions increase arrhythmia risk. An overactive or underactive thyroid can directly alter your heart rhythm. Sleep apnea stresses the heart by repeatedly cutting off oxygen during the night. Kidney disease, COPD, obesity, and diabetes all raise the likelihood that palpitations point to something electrical rather than just adrenaline. Even recent viral infections, including flu and COVID-19, can temporarily inflame heart tissue and trigger rhythm changes.
If any of these apply to you, treat new or worsening palpitations with a lower threshold for calling your doctor. What might be a “mention it next visit” situation for a healthy 30-year-old could be a “get seen this week” situation for someone with an existing cardiac condition.
Common Harmless Triggers
The majority of palpitations have a benign cause. Anxiety and stress top the list, followed closely by caffeine, alcohol, spicy food, nicotine, and intense exercise. Pregnancy commonly triggers them due to increased blood volume and hormonal shifts. Low blood sugar, dehydration, and low levels of potassium, magnesium, or calcium can also set them off.
If you can link your palpitations to one of these triggers and they stop within a few minutes once the trigger passes, they’re very likely harmless. Cutting back on coffee, managing stress through breathing exercises or meditation, staying hydrated, and avoiding alcohol are often enough to reduce or eliminate episodes entirely. The key distinction is whether those changes actually work. If you’ve addressed the obvious triggers and palpitations persist, that’s your cue to get a medical evaluation.
What Happens at the Doctor’s Visit
Your doctor will likely start with a standard electrocardiogram (ECG), a quick, painless test that records your heart’s electrical activity through sensors placed on your chest. If you’re having palpitations at the time of the test, an ECG can often identify the rhythm problem right away.
The challenge is that palpitations tend to come and go. If your ECG looks normal in the office, your doctor may send you home with a Holter monitor, a small portable device about the size of a cell phone that continuously records your heart rhythm for 24 to 48 hours while you go about your day. You press a button whenever you feel palpitations so the recording can be matched to your symptoms. This monitor can detect a wide range of arrhythmias, from atrial fibrillation to more complex rhythm disorders, that a single ECG snapshot might miss. For palpitations that happen less frequently, longer-term monitors worn for weeks are also available.
How to Track Palpitations Before Your Visit
The more detail you bring to your appointment, the more useful that visit will be. Keeping a simple palpitation diary for a week or two before you go gives your doctor real data to work with. For each episode, jot down:
- Date and time
- Heart rate (check your pulse or use a smartwatch)
- How it started: suddenly, like a light switch, or gradually building
- How long it lasted
- What you were doing right before (exercising, lying in bed, drinking coffee, feeling anxious)
- Any other symptoms during the episode: dizziness, chest tightness, shortness of breath, sweating
Sudden-onset palpitations that flip on and off like a switch are more suggestive of a true arrhythmia than ones that build gradually with stress or exertion. That distinction alone can steer your doctor toward the right diagnosis faster. If your smartwatch or fitness tracker has a heart rhythm feature, saving those recordings to show your doctor can also be genuinely helpful.