|
NBC11.com - Health Encyclopedia - Atrial Fibrillation/flutter (1018 words) |
 | It usually involves a rapid heart rate, in which the upper heart chambers (atria) are stimulated to contract in a very disorganized and abnormal manner. |
| If the atrial fibrillation/flutter is part of a condition called sick sinus syndrome, the sinus node may not work properly, and the heart rate may alternate between slow and fast. |
| Underlying causes of atrial fibrillation and flutter include dysfunction of the sinus node (the "natural pacemaker" of the heart) and a number of heart and lung disorders, including coronary artery disease, rheumatic heart disease, mitral valve disorders, pericarditis, and others. |
Feeds |
Contact