AFib (Atrial Fibrillation) causes your heart's upper chambers to beat irregularly and rapidly, leading to a fast, erratic pulse, often between 100–200 beats per minute (bpm), much higher than the normal resting rate of 60–100 bpm, with symptoms like palpitations, fatigue, and shortness of breath. This chaotic electrical signal makes the lower chambers (ventricles) try to keep up irregularly, increasing stroke risk and potentially causing heart failure if unmanaged.
What is a Normal Heart Rate for Someone with Atrial Fibrillation? The normal heart rate for someone without A-fib typically runs from 60-100 beats per minute, while a patient with A-fib may see a heart rate jump to 100-200 beats per minute.
During atrial fibrillation, the heart's upper chambers, called the atria, beat chaotically and irregularly. They beat out of sync with the lower heart chambers, called the ventricles. AFib may cause a fast, pounding heartbeat, shortness of breath or light-headedness. Some people don't notice symptoms.
If you live with AFib, a heart rate of 110 bpm that doesn't improve with rest or your prescribed medications can be cause for concern. An elevated heart rate, particularly when there are symptoms, may warrant a visit to the ER.
The 30-second rule in atrial fibrillation (AFib) is a widely used, though debated, guideline defining an AFib episode as an irregularly irregular heart rhythm lasting at least 30 seconds on an ECG, used to distinguish it from shorter, less significant atrial arrhythmias and help guide diagnosis and treatment, particularly for stroke risk and ablation success. While a standard for trials and device monitoring, newer research suggests shorter runs of AF might still be clinically important, prompting ongoing discussion about whether this threshold accurately reflects stroke risk and overall AF burden.
An RHR over 100 could be a sign of an infection, heart arrhythmia or a worsening heart problem. Studies link an elevated RHR, especially in men, with a greater risk of premature death. A low RHR, around 50 beats per minute or less, can also be a red flag.
Current guidelines support the well-established clinical practice that patients who present with atrial fibrillation (AF) of less than 48 hours duration should be considered for cardioversion, even in the absence of pre-existing anticoagulation.
A personal survey of patients with atrial fibrillation (AF), one of the most important causes of irregular heartbeats, has found that the majority of triggers for the condition are easily modifiable lifestyle choices, including alcohol, caffeine, exercise and lack of sleep.
Valsalva maneuver
If you are unfamiliar with this method, there are just a few simple steps: hold your nose, then close your mouth and try to pop your ears by blowing. This works by stimulating the vagus nerve and can help lower your heart rate if it is beating too fast.
Experts have identified heart rate danger zones for AFib patients that should sound an alarm. A resting heart rate consistently over 110-130 beats per minute (bpm) or exercise heart rate exceeding 170 bpm starts entering the high-risk category.
Symptoms of atrial fibrillation
If you notice that your AFib episodes happen more often, last longer, or your medication doesn't help as much, your condition is probably getting worse. As AFib progresses, you might notice some signs. You might feel more weak, tired, lightheaded, and anxious about the condition.
Everyone is different when it comes to comfort during AFib episodes. Some find lying down helpful, while others might feel worse. For example, people with orthopnea might find sitting upright more comfortable. It's important to understand these differences to find the best rest position for each person.
Catheter ablation is a safe and effective way to treat AFib when medications don't work or cause negative side effects. Catheter ablation usually doesn't require a prolonged hospital stay. Depending on your condition, you may be able to go home the same day as your procedure.
If you have atrial fibrillation (AFib), you should avoid triggers like excessive alcohol, caffeine, smoking, and stimulants, manage stress, limit salt, get enough sleep, and talk to your doctor about certain medications (like decongestants) and exercise routines, stopping immediately if you feel dizzy or short of breath to prevent episodes and complications like stroke.
Afib episodes can occur any time of day or night. Nighttime Afib can have different symptoms than a daytime episode, because you're at rest. You might also notice Afib at night more easily if you're resting or being quiet.
Difficulty breathing, especially when lying down or when exercising. Chest pain. Dizziness or fainting. Heart palpitations, or the feeling that your heart is skipping a beat, fluttering, pounding, or beating too hard or too fast.
Age is a major risk factor for atrial fibrillation, but so is high blood pressure, which causes one in five cases of AFib. Additionally, “diabetes and other heart problems and structural problems such as blockages in your heart arteries or heart failure are also risk factors,” Dr. Dominic said.
The 30-second rule in atrial fibrillation (AFib) is a widely used, though debated, guideline defining an AFib episode as an irregularly irregular heart rhythm lasting at least 30 seconds on an ECG, used to distinguish it from shorter, less significant atrial arrhythmias and help guide diagnosis and treatment, particularly for stroke risk and ablation success. While a standard for trials and device monitoring, newer research suggests shorter runs of AF might still be clinically important, prompting ongoing discussion about whether this threshold accurately reflects stroke risk and overall AF burden.
Pulsed field ablation: A safer, faster AFib treatment
In pulsed field ablation (PFA), ultra-fast electrical pulses destroy the problem cells by creating tiny pores in their membranes. PFA specifically targets heart cells, so it's less likely to damage nearby tissue, reducing the risk of side effects.
Paroxysmal AFib – Episodes begin suddenly and stop on their own, usually within a few hours or days. Persistent AFib – Lasts longer than seven days and may require medical intervention to restore normal rhythm.
Call your local emergency number if you suddenly experience chest pain, pressure, heaviness or discomfort, fainting or shortness of breath. You may want to ask your healthcare provider: What kind of heart disease do I have?
If you're sitting down and feeling calm, your heart shouldn't beat more than about 100 times per minute. A heartbeat that's faster than this, also called tachycardia, is a reason to come to the emergency department and get checked out. We often see patients whose hearts are beating 160 beats per minute or more.
Sleeping on the right side is often recommended for individuals with AFib. This sleeping position helps ease the strain on the heart and supports better blood flow. It may also lower the risk of acid reflux, which can trigger nighttime palpitations.