THE association of atrial fibrillation and arterial embolization is a well known clinical entity. However, this sequence in a patient with no clinical evidence of organic heart disease is exceedingly rare.Case ReportA 49-year-old woman was admitted to the hospital on January 15, 1958, because of a left-sided hemiparesis of sudden onset, unassociated with loss of consciousness. For 2 years before admission, she had experienced frequent attacks of palpitation, which had been increasing in frequency and which seemed to be related to exercise, amount of coffee consumed (10 to 15 cups a day) and excessive smoking. There was no . . .