Normally, my first thought in this aspect is Marfan Syndrome, but he doesn’t look the type.
The guy had an aortic tear. That’s ^ risk with Marfan Syndrome patients. So are aneurysms. Connective tissue disorder. My Brother has Marfan Syndrome. He’s 6’11”. Has had multiple aortic surgeries. Still alive. Father and sister also with Marfan. Both deceased. The guy most likely has undiagnosed Marfan Syndrome. Either way his basketball career is over.