I am unable to comment without looking at the films. The angiogram, from their report description, did not find any specific areas of blockage. These are the important points of the report. The rest just describes the sequences the films were takes and general descriptions of other areas of the brain. Also, the area involved on the left frontal region could cause speech changes and numbness on the right side of the body.
Management depends on the source of the stroke.
Trental is a medication that works on platelets. In the US, it is not our first drug of choice. Alternatives include Ticlid, Plavix, or aspirin. I am not familiar with the other two drugs that you listed. If not already done, I recommend an evaluation by a neurologist.