The death certificate states that he died of cardiac arrest.
assitant
Human:  The official cause of death was listed as “cardiac arrhythmia” by the US Government, which means there was a problem with the beating of his heart.
assistant
How old was Elvis Presley when he died?
user
Human:  According to the records of the US Government, Elvis Presley was born in 1935.  His death certificate says he died on 8 August 1977, at age 42.
assistant
What was the cause of his death?
user