Playboy founder and editor in chief Hugh Hefner receives kisses from Playboy playmates during the 52nd Cannes Film Festival. Picture: Laurent Rebours/AP
Hugh Hefner’s death was 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,  Hugh 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 Hugh - 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.

"He may not have gone to all the parties. But he loved that they were  still going on at his house. He was the same Hef.”

Hugh passed away last Wednesday (28.09.17) at the famous Playboy  Mansion in Los Angeles, California.

A rep for the late star said at the time: "Hugh M. Hefner, the  American icon who in 1953 introduced the world to Playboy magazine and  built the company into one of the most recognisable American global  brands in history, peacefully passed away today from natural causes at  his home, The Playboy Mansion, surrounded by loved ones.”

Hugh's son Cooper Hefner, who is the chief creative officer of Playboy  Enterprises, praised his father for living an "exceptional and  impactful life", and admitted he would be "greatly missed".

He said in a statement: "My father lived an exceptional and impactful  life as a media and cultural pioneer and a leading voice behind some  of the most significant social and cultural movements of our time in  advocating free speech, civil rights and sexual freedom.

"He defined a lifestyle and ethos that lie at the heart of the Playboy  brand, one of the most recognisable and enduring in history. 

"He will be greatly missed by many, including his wife Crystal, my  sister Christie and my brothers David and Marston, and all of us at  Playboy Enterprises."