The cause of death wasn't known.
Poddubny played two seasons for the Rangers between 1986 & 1988, playing in 152 games while amassing 78 goals and 97 assists. He was traded to the Quebec Nordiques for Jason Lafrieniere and Normand Rochefort after the 1988 season.
...btw, what a terrible trade, a 40-goal scorer for Normand Richefort!!!