Sorry I feel so silly, completely slipped my mind! We are in Bangkok, near the Chidlom BTS station.
He had a triple bypass a few years ago after having a heart attack. The cause of the heart attack was internal stomach bleeding that was undiscovered for a few days. While recovering from the surgery, he contracted multiple infections in the ICU, and had heart failure and kidney failure, which was when he started being treated by the internist overseas.
He does not currently have heart failure and he has no kidney problems now but he does have arrhythmia, and they closely monitor the heart failure symptoms. He has had high blood pressure for a long time, it resulted in a stroke 20 something years ago but he recovered with no long term issues from that.
Thank you!