A coroner praised a nurse and an off-duty ambulance worker for “keeping their heads” and helping a fatally injured pensioner.
Amanda Burn, regional manager with Marie Curie Cancer Care, and Kerry Hill gave first aid to Alexander Martin (83) when he fell off his bike.
An inquest in Spalding on Friday heard Mr Martin, of Primrose Crescent, Pinchbeck, had a number of health conditions that could cause him to turn dizzy or lose consciousness and fall.
Forensic pathologist Professor Peter Vanezis, who gave evidence at the inquests of Princess Diana and Dodi Fayed, said Mr Martin did not have any injuries from being hit by a vehicle.
He said Mr Martin had suffered “a cardiac event” and felt that was likely to be a consequence of his fall.
Police collision experts said there was no damage on Mr Martin’s cycle to show it had been hit by a car.
South Lincolnshire Coroner Robert Forrest recorded a verdict of accidental death.
Mr Martin fell from his bike at about 9.45am on July 17 in Pennytoft Lane, Pinchbeck, and died the following day in the intensive care unit at Boston’s Pilgrim Hospital.
Retired bank clerk Anne Jackson was out walking and was certain no vehicles had passed by at the time he fell off his bicycle.
She first saw him standing behind a van and a short time later he was face down in the middle of the road.
Mrs Burn was on her way to her mother’s Pinchbeck home when she came across the accident,
She helped move Mr Martin’s head to one side to clear his airways and helped Kerry Hill, an ambulance emergency care assistant, to administer CPR.
Mrs Burn remained at the scene when an ambulance and air ambulance arrived and said there was a “flat line” when Mr Martin was connected to an ECG machine.
Mr Martin’s son, Stuart, said: “I would just like to say thanks from the family for intervening.”