Atrial fibrillation occurs and maintains itself in the context of a morphologically and functionally altered atrial substrate that can be induced by stressors such as underlying diseases (cardiac or ...

Atrial fibrillation (AF or afib) is a type of heart rhythm disorder, or arrhythmia. It causes your heart to beat irregularly and can significantly increase the heart rate, leading to your heart’s ...

Atrial fibrillation (AFib) is a type of irregular heartbeat. If you have it, your doctor will classify yours by the reason for it and on how long it lasts. When your heartbeat returns to normal within ...