Hugh Hefner's death last week was reportedly caused by cardiac arrest.
The founder of Playboy magazine passed away peacefully in his home last week at the age of 91, and it has now been revealed that his death came after he went into cardiac arrest and subsequently experienced respiratory failure.
According to his death certificate, which was obtained by The Blast, Hefner was also suffering from Septicemia - which is a severe blood infection - and had recently battled a strain of E. coli infection which was so strong, it was resistant to antibiotics.
Despite his underlying health problems, it was previously reported that Hefner - who was laid to rest over the weekend - was "loving life" and "keeping up his routine" in his final days.
A source said: "Hef was loving life. He was social and keeping up his routine. He was sharp as a tack. He was still making business decisions.