What are the Symptoms of Atrial Fibrillation (AFib or AF)? What are the Symptoms of Atrial Fibrillation (AFib or AF)? http://www.heart.org What are the Symptoms of Atrial Fibrillation (AFib or AF)? What are the Symptoms of Atrial Fibrillation (AFib or AF)? heart.org heart.org don’t have symptoms heart.org heart.org heart.org heart.org