Atrial Fibrillation, What is afib, What causes afib - Doctablet®

Atrial Fibrillation, What is afib, What causes afib


Afib, Arrhythmia, Cardiology, Medicine

What is atrial fibrillation?

Atrial fibrillation is an abnormal heart rhythm that causes a fast and irregular pulse. In atrial fibrillation, parts of the atria send disorganized electrical impulses into the top of the heart. These abnormal discharges cause the atria to shake like jelly. This activity takes over the heart’s normal beats, and the body is not able to control how fast the heart is beating. This causes the most common symptom of atrial fibrillation: fatigue.

The most common symptom of afib is fatigue

What is afib? : an abnormal heart rhythm

Atrial fibrillation is the most common type of abnormal heart rhythm. An estimated three to six million Americans have it.  In fact, it happens so commonly, doctors have a nickname for it — “a fib.” Most often, the risk of a fib increases as we get older. As people age, so does their heart, and age is the biggest risk factor for developing a fib.  Just 2% of people under the age of 65 have atrial fibrillation, but as high as 9% of those over the age of 65 have it.

2% of people under the age of 65 have a fib, but as high as 9% of those over the age of 65 have it

What causes afib?

  • Advanced age

    This is the most important risk factor.

  • Obesity

  • Thyroid problems

  • Too much alcohol, caffeine or energy drinks

  • Lung problems like COPD

  • Sleep apnea

  • Severe illness

Afib causes two main problems:

afib causes symptoms and possibly a stroke
Afib can cause symptoms
Afib increases your chances of having a stroke
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Last Modified: Nov 24, 2017 @ 8:18 pm
About the Author

Jorge Romero M.D. F.A.C.C. F.H.R.S.


Jorge Romero, MD, is an Attending Physician and Assistant Professor of Medicine in the Arrhythmia Service in the Cardiology Division at the MontefioreEinstein Center for Vascular Care. He specializes in the treatment of complex arrhythmias, particularly in catheter ablation of ventricular tachycardia and atrial fibrillation using cutting-edge technology. Dr. Romero is a member of the American Heart Association (AHA), and a fellow of the Heart Rhythm Society (FHRS) and the American College of Cardiology (FACC).


Jose Taveras M.D. F.A.C.C.


Dr. Taveras is a non-invasive cardiologist in the Montefiore-Einstein Center for Heart and Vascular Care in Bronx, New York. He trained in both internal medicine and pediatrics and is currently an assistant professor of medicine at Albert Einstein College of Medicine. Dr. Taveras is a fellow of the American College of Cardiology. He is the co-creator of Doctablet.

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