A Fib Cardiac Arrest - Web atrial fibrillation (afib) is an irregular heart rhythm that begins in your heart’s upper chambers (atria). Atrial fibrillation, also known as afib or af, can. Web atrial fibrillation is a quivering or irregular heartbeat, or arrhythmia. Web although it can cause chest pain and other symptoms that are similar to a heart attack, atrial fibrillation doesn't.
Web atrial fibrillation is a quivering or irregular heartbeat, or arrhythmia. Web atrial fibrillation (afib) is an irregular heart rhythm that begins in your heart’s upper chambers (atria). Web although it can cause chest pain and other symptoms that are similar to a heart attack, atrial fibrillation doesn't. Atrial fibrillation, also known as afib or af, can.