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Atrial fibrillation (AF, AFib or A-fib) is an abnormal heart rhythm (arrhythmia) characterized by rapid and irregular beating of the atrial chambers of the heart. [ 11 ] [ 12 ] It often begins as short periods of abnormal beating , which become longer or continuous over time. [ 4 ]
Afib happens when those cells start acting up after being triggered by something. That something could develop over time, fed by poor diet and exercise or a lifetime of excessive sports.
There are two major classes of cardiac fibrillation: atrial fibrillation and ventricular fibrillation. Atrial fibrillation is an irregular and uncoordinated contraction of the cardiac muscle of atria. It can be a chronic condition, usually treated with anticoagulation and sometimes with conversion to normal sinus rhythm.
Individuals with LGL syndrome do not carry an increased risk of sudden death. The only morbidity associated with the syndrome is the occurrence of paroxysmal episodes of tachycardia which may be of several types, including sinus tachycardia, atrioventricular nodal re-entrant tachycardia, atrial fibrillation, or atrial flutter. [4]
A new study suggests that atrial fibrillation (AFib) may be more common in people under 65 than shown by previous research. Skip to main content. Sign in. Mail. 24/7 Help. For premium support ...
These abnormal heart rhythms often occur at a young age. They may take relatively benign forms such as atrial fibrillation, leading to symptoms of palpitations, breathlessness, or fatigue. [3] Accordingly, atrial fibrillation presenting in a newborn should raise the suspicion of short QT syndrome. [1]
Previous studies have reported that about 3.3 million people in the United States have atrial fibrillation (AFib) — a condition that causes the heart to beat in an irregular pattern or very rapidly.
The European Heart Rhythm Association score of atrial fibrillation (or EHRA score) is a classification system for the extent of atrial fibrillation.It places patients in one of four categories based on how much they are limited during physical activity; the limitations/symptoms are in regard to normal breathing and varying degrees in shortness of breath and/or angina.