His doctors have to answer how they never did a thorough exam on him in 5 years that could have detected that small hole in his heart years ago.
If that had been fixed when he was younger the first stroke would not have occured and he would very likely be working at his desk today.
That first stroke has to be related to this stroke. Either the blood thinners caused leakage or the first stroke injury lead to the cerebral hemmorage.
Your hindsight into a matter about which you know nothing is rather amazing.