as a result of a blood clot.
Budanov was head of Ukraine intelligence. A very capable young man without military connection. He was originally planned to replace Zaluzhnyi as head of Ukraine's armed forces.
Link: https://www.kyivpost.com/post/28630#:~:text=Kyrylo%20Budanov%2C%20chief%20of%20the,result%20of%20a%20blood%20clot.