Hearn is the chairman of Matchroom Sport, World Snooker and professional darts organisation PDC.
His son, who leads Matchroom Boxing, confirmed the news with a tribute to the NHS and an update on his father’s health.
Sharing the full story, not just the headlines
He wrote: “As if we can’t thank the NHS enough, I want to particularly thank the staff at Broomfield and Basildon.
“My dad Barry Hearn was taken to hospital on Sunday after a minor heart attack and was operated on yesterday.He is up and well and returns home today in good spirits! Thank you.”
Hearn has been active on Twitter despite recovering in hospital, even reaching out to a fan to thank him for his fiancée’s work for the NHS.
Hearn wrote: “Thanks for lending me your fiancée – along with the rest of the nhs she’s doing an amazing job. See you at the boxing!”
Matchroom have postponed all shows for this month and May in line with the government’s measures to combat the coronavirus.
While Anthony Joshua vs Kubrat Pulev, initially scheduled for 20 June is also off with a new date currently being discussed.