Lone Auricular Fibrillation

Mitral stenosis, thyroid toxemia, cardiac infarction, constrictive pericarditis, and hypertension are among the common causes of auricular fibrillation. Occasionally, however, the arrhythmia is discovered fortuitously and subsequent investigation shows that structural heart disease is absent. The condition has been described. variously as benign, idiopathic, arteriosclerotic, functional, and senile fibrillation, fibrillation of unknown origin and fibrillation without heart disease. We have proposed for it the term lone auricularfibrillation.