“Star Trek” actor Walter Koenig’s official cause of death revealed

Key Points

• An official cause of death has been determined for Star Trek actor Walter Koenig.

• Koenig, known for playing Russian crewman Pavel Chekov, died Oct. 25, at 90.

• Koenig was laid to rest at the same cemetery as his son, Andrew, who died in 2010.

New details have been disclosed one week after the death of Walter Koenigthe actor known for playing Russian crewman Pavel Chekov in the Star Trek franchise.

The actor’s death at 90 was caused by cardiopulmonary arrest, with chronic diastolic congestive heart failure as an underlying cause, according to a death certificate obtained by PEOPLE. Acute renal failure was also indicated as a significant contributing condition.

According to the document, which was first reported by TMZKoenig was cremated Friday and laid to rest at Hollywood Forever cemetery in Los Angeles. Koenig’s late son, fellow actor Andrew Koenig, was also laid to rest at Hollywood Forever after his death by suicide in 2010.

A representative for Walter Koenig said last week in a statement to Variety that the actor died of old age on Oct. 25. “Walter helped inspire audiences with his optimism, humor, and adventurous spirit,” the rep said. “Beyond Star Trekhis long and distinguished career showcased his versatility as an actor and his genuine love for his craft.”

A Chicago native, Koenig appeared on Star Trek from 1967 to 1969 and reprised his role as Chekov in several Star Trek movies.

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The actor spoke highly of Star Trek‘s dedicated fandom, telling the Television Academy in an interview, “That camaraderie among Star Trek fans became more extensive when they started having conventions. It wasn’t only what you’d traditionally call nerds.” He added, “It was people who had a sense of humanity and a sense of justice. People who had imagination and people who loved monsters. It covered a much larger canvas than was initially thought.”

His other screen credits included The Alfred Hitchcock Hour, Gidget, I Spy, Mannix, Columboand Babylon 5.

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