Redknapp had two stents inserted to unblock the arteries on Wednesday and the club said the 64-year-old would be released within 48 hours.
Redknapp, who will miss the Europa League Group A game at Rubin Kazan, has made good progress in his recuperation and it is understood that he will be released from hospital either on Thursday afternoon or in the evening.
It has yet to be decided whether he will take charge of his team's game at Fulham on Sunday, although he was in an upbeat mood on Wednesday, declaring that he would be back at work on Friday.
Assistant manager Kevin Bond will manage the team in Kazan, where Spurs will seal their progression to the last 32 of the Europa League with a win.
Source: PA
Source: PA