The father of a Worcestershire woman thrown from her horse during a polo match has asked if "there are lessons that can be learnt" after his daughter died from complications caused by anaesthetic used to treat her brain injuries.
Catherine Yates, 20, treasurer of Cambridge University Polo Club, of which the Prince of Wales is president, was playing a junior version of the sport for players under 25 on August 3, 2006 when she collided with two other players, an inquest heard.
Witnesses at the Aston Down ground, in Cirencester, Gloucestershire, saw the horse roll over the experienced player, who was soon to turn 21, after the saddle broke and she was thrown forwards.
Miss Yates, from Pershore, who was competing against Northern Ireland polo team for North Cotswolds, was airlifted unconscious to Frenchay Hospital, in Bristol.
Six days later on August 9, 2006, she died from a reaction to a "first choice" sedative administered to treat her brain injuries.
At the inquest in Flax Bourton Village Hall, near Bristol, a statement was read from Miss Yates's father Ian, from Pershore, who witnessed the accident along with his wife Wendy.
He said: "We have one question. While in the ITU, my daughter was treated with a number of drugs to reduce the swelling in the brain.
"According to the consultant that treated her and the post mortem examination it was likely that one of these drugs caused muscle damage which caused her heart to stop pumping normally and ultimately led to her death.
"There have apparently been a small number of similar cases before and we wondered if there are lessons that can be learnt from this?"
But recording a verdict of misadventure, Avon deputy coroner Brian Whitehouse said no criticism could be levelled at anyone for Miss Yates's death.