What are arrhythmias?
Your heart usually keeps a regular, steady beat. “The heart is a muscular pump that’s electrically active. Electrical signals tell your heart when to squeeze and relax so blood keeps moving through your body,” explains Carl Musser Jr., MD, with the Cardiovascular Institute at Carilion Clinic. “But sometimes those signals can get mixed up and cause problems with the rhythm of your heartbeat. That’s called arrhythmia.”
Arrhythmias are common. Some are harmless and mostly just annoying, while others need medical attention. Your heart may:
- Beat too fast (tachycardia)
- Beat too slow (bradycardia)
- Skip beats or beat irregularly
Arrhythmias can come and go, or they may be ongoing. Some people feel them clearly, while others don’t notice them at all.
Common types of arrhythmias
There are many kinds of arrhythmias, but some of the most common are:
- Atrial fibrillation (AFib) or atrial flutter: An often, fast, irregular beat that comes from the upper chambers of the heart
- Supraventricular tachycardia (SVT): Sudden episodes of a very fast heartbeat coming from the upper chambers or middle of the heart that can start and stop abruptly
- Ventricular tachycardia: An abnormal beat coming from the lower chambers of the heart
Symptoms to watch for
Arrhythmia symptoms can feel different from person to person. You might notice:
- Fluttering, flipping, pounding, or racing in your chest
- A feeling that your heart skipped a beat
- Dizziness or lightheadedness
- Shortness of breath
- Feeling unusually tired or weak
- Chest discomfort
- Fainting or almost fainting
If symptoms come on suddenly, feel severe, or include chest pain or fainting, get medical help right away.
What causes arrhythmias?
Arrhythmias can have lots of triggers, including:
- Heart disease or a past heart attack
- High blood pressure
- Electrolyte imbalances (like low potassium or magnesium)
- Stress or anxiety
- Too much caffeine or alcohol
- Smoking or recreational drug use
- Certain medicines
- Thyroid problems
Sometimes, they show up with no clear cause at all.
How are arrhythmias diagnosed?
Because arrhythmias don’t always happen on cue, your doctor may need to monitor your heart over time. That could include:
- An EKG (a quick test that records your heart’s electrical activity)
- A portable heart monitor you wear for a few days or weeks
- Bloodwork
- Imaging tests, like an echocardiogram
These tests help figure out what type of issue is going on—and whether it needs treatment.
Treatment options
Treatment depends on the type of arrhythmia, your symptoms, and overall health. Options may include:
- Lifestyle changes: Cutting back on caffeine or alcohol, managing stress, improving sleep, and staying active
- Medicines: To slow your heart rate, steady the rhythm, or lower stroke risk
- Procedures: Like cardioversion or catheter ablation to restore normal heart rhythm
- Devices: Pacemakers or implantable defibrillators for certain heart rhythm problems
Some arrhythmias don’t need treatment at all—just regular check-ins with your doctor.
Everyday habits to support your heart
You can’t prevent every heart issue, but healthy habits go a long way:
- Eat a heart‑healthy diet
- Move your body regularly (check with your doctor if you have existing heart issues)
- Find ways to manage stress
- Go easy on alcohol and caffeine
- Don’t smoke
- Keep up with regular medical visits
When to talk to your doctor
“If you’re noticing unexplained fatigue, dizziness, or changes in how your heart feels, it’s a good idea to talk with your doctor,” says Dr. Musser. Getting checked early can help catch problems before they become more serious.
If you have questions or are experiencing concerning symptoms, don’t wait—reach out to your family doctor or established cardiologist.
