President Pranab Mukherjee is in good spirits and may be discharged tomorrow after remaining in hospital for three days during which he underwent heart procedure after doctors detected a blockage. The President, who turned 79 last week, is in good spirits and progressing well, official sources said today. Doctors at Army's Research and Referral Hospital in the capital, who installed a coronary stent in his artery on Saturday to remove a blockage, recommended that Mukherjee should continue to remain hospitalised for today as a precautionary measure, the sources said.