to study whether atrial fibrillation might produce local changes in the atrium which could facilitate the tendency of this arrhythmia to become chronic and self-perpetuating , we compared the effect of atrial fibrillation , atrial pacing , and acute volume loading on the perfusion and oxygen consumption of the atrium in anesthetized dogs .
C0003811
arrhythmia
C0004238
atrial fibrillation