Arrhythmia and stroke. Stroke but!

My mother recently suffered a ischemic stroke but thank god she has recovered and having no major impairment except a bit speaking difficulty which the doc said will improve within few days she is currently on concor 2.5 mg aspirin 150mg xyrol 10mg and atorvastatin 80mg plus alprazolam 0.125mg and paroxetine 12.5 mg for anxiety. She was already taking concor 5 since suffering a TIA attack 8 months back despite taking regular medicine she suffered stroke and the cause of stroke has been said to be arrhythmia. I want to know what is the best treatment option? And given her age only 52 what are the prognosis she is not having any other illnesses like bp or diabetes i am attaching the reports of MRI AND ECHO