Chief Justice Saqib Nisar on Sunday underwent a successful angioplasty after doctors found his arteries blocked during a routine checkup, DawnNewsTV reported.
According to Maj Gen Athar Kiyani, the head of Rawalpindi Institute of Cardiology, a medical board will decide on Monday if the chief justice needs to remain hospitalised any further.
"The chief justice is feeling better," Kiyani said.
According to DawnNewsTV, the chief justice had gone to the hospital for a routine checkup when doctors suggested that he should undergo an angioplasty.
Two balloon stents were inserted in Justice Nisar's heart during the procedure.
Following the surgery, the chief justice was shifted to a room where his family was allowed to meet him. Justice Asif Saeed Khosa also visited Justice Nisar at the hospital.
The hospital officials said that the chief justice has been advised to rest for at least four days.