A 62-year-old heart patient endured a six-day wait for a bed on a hospital trolley.
The hospital opened late last year
Herbert Edwards was admitted to the Great Western Hospital in Swindon, Wiltshire, suffering from severe chest pains on 18 March.
By the time he left on 24 March he had spent 144 hours on a trolley in a converted ward as the £150m hospital's 541 beds were all occupied.
But while Mr Edwards's time on the trolley is almost double the current Guinness world record of 77 hours, it does not qualify as he was not in a corridor.
The current Guinness world record for a trolley wait is 77 hours and 30 minutes spent by Tony Collins, 40, at the Princess Margaret Hospital - also in Swindon - which has now closed.
Guinness World Records said Mr Edwards's wait did not qualify for a record because its adjudicators say a patient must be left on a trolley in a corridor, "not a designated area".
The Swindon and Marlborough NHS Trust said 414 patients had to be treated on trolleys at the hospital last month.
Spokesman Chris Birdsall confirmed Mr Edwards was a patient at the hospital between 18 and 24 March.
"During that time he was in an area normally designated for recovering angiogram patients which had been converted into a ward as we were extremely busy at that time.
"Because of space constraints trolleys rather than the full-width beds had to be used on the ward.
"However, it is important to stress that Mr Edwards's bed was in a designated place in a designated ward.
"We must point out that Mr Edwards was not confined to his bed during his stay."