<prompt> A 56-year-old woman presents with word-finding difficulty and hand weakness for 1 hour. ECG was done to find cause of TIA. ECG shows?Atrial fibrillationAtrial flutterParoxysmal atrial tachycardiaMulti-focal atrial tachycardia  <response>: Ans. a Atrial fibrillation.The rhythm is irregularly irregular at a rate of approximately 90 beats min. There is no clear atrial activity; thus, the diagnosis is atrial fibrillation. Other findings include a normal axis, normal intervals, no evidence of chamber enlargement or hypertrophy, and non-specific ST-T wave abnormalities inversions and flattening in leads V1 and V2. 