"We are monitoring his condition continuously. His blood sugar level is high and the pulse and blood pressure is on the lower side. He has a history of chronic diabetes," said a doctor, requesting anonymity.
Seventy-year-old Tunda was admitted to the intensive cardiac care unit of AIIMS on Friday after he complained of chest pain.
He was first taken to the neighbouring Safdarjung Hospital on Thursday night and later shifted to AIIMS due to security concerns.
A series of tests, including an electrocardiogram (ECG) and angiography, showed there was a blockage in his artery that was causing irregular heart rhythm.
He was taken to the cath lab at around 2.45 pm on Saturday for the procedure. According to hospital sources, court proceedings were conducted in the AIIMS ICCU before the procedure, with the Metropolitan Magistrate visiting the institute. Tunda was also allowed to speak to his family in Pakistan.