Former prime minister Nawaz Sharif suffered angina pain on Saturday morning while undergoing treatment at a Lahore hospital, DawnNewsTV quoted Services Institute of Medical Sciences (SIMS) Principal Prof Dr Mahmood Ayaz as saying.
The doctor refuted reports that the PML-N leader had suffered a heart attack.
Punjab Health Minister Dr Yasmeen Rashid held a press conference in the afternoon during which she revealed that Sharif had also experienced angina pain the night of October 24.
"Cardiologists were on hand at that time and they conducted some tests. According to an enzymes test, he had experienced a minor heart attack that night," she said.