The Coroner's statement said the second post-mortem's conclusions were provisional.G20 death was not heart attack
In its statement, the Coroner's Court said that the inquest had looked at the first post-mortem carried out after Mr Tomlinson collapsed and died on the evening of 1 April.
That examination, carried out by Dr Freddy Patel, concluded that Mr Tomlinson had diseased heart and liver and a substantial amount of blood in the abdominal cavity.
"His provisional interpretation of his findings was that the cause of death was coronary artery disease," said the statement.
"A subsequent post-mortem examination was conducted by another consultant forensic pathologist, Dr Nat Cary, instructed by the IPCC and by solicitors acting for the family of the late Mr Tomlinson.