My father had a stroke one month ago resulting weakness in right side of his body and confusion we took him to the hospital within an hour Dr done THROMBOLYSIS. After few hours he regained strength in his hand and feet but his speech affected he could not pronounce some words we thought speech therapy will help him improve his speech ability. But after discharge from hospital we recognised he is still in confusion and he is becoming more aggressive day by day . He had an heart attack in 1999 and his EF is 20% . Please let me know what is the reason and what treatment should start . Thanks in advance.