Postconversion systemic arterial embolism.
D001281:Atrial Fibrillation / Q000628:therapy*; D004554:Electric Countershock / Q000009:adverse effects*; D004617:Embolism / Q000209:etiology*; D006801:Humans; D008875:Middle Aged; D012214:Rheumatic Heart Disease / Q000150:complications*