Vinod Kambli's wife Andrea said doctors attending to him has told her that there was "no reason to worry".
"Angiography was done on Vinod earlier in the day. The doctors said everything is fine and that there is no reason to worry. His health is a lot better now. He will be discharged tomorrow," she said.
The 41-year-old was rushed to the suburban hospital by police personnel after he complained of chest pain while driving his car and sought help. He has been in ICU since then.
The former middle-order batsman shared an unbroken partnership of 664 runs in a school match against St Xavier's School, Fort, with childhood friend and cricketing great Sachin Tendulkar who recently retired from the game.
Kambli, an elegant left-hander in his playing days, had undergone angioplasty on two of his blocked arteries in July last year.
Kambli, who now appears as a cricket expert on TV channels, has played 17 Tests and 104 ODIs for India. In his short Test career, Kambli scored 1084 runs at an average of 54.20, while his 104 ODI appearances yielded 2477 runs at 32.59.
He played his last international match in 2000 and retired from first-class cricket in 2011.