The sources said Mr Sharif had himself gone to the hospital after taking appointment for what they described as a simple and routine heart procedure.
However, due to some complications, the doctors had to perform some more procedures on an emergency basis, the sources said.
Besides his brother and Punjab Chief Minister Shahbaz Sharif and some members of his family, including Senator Ishaq Dar, a Lahore doctor who had been treating Mr Sharif for a long time had also flown to London.
“Mr Sharif is now recovering well and is expected to be shifted to his home in the next couple of days,” said Senator Pervez Rashid, who remained with Mr Sharif in London during his exile. Dawn
Senator Rashid told that Mr Sharif had undergone a process known as “radiotherapy”.
Now Doctors has advised Nawaz Sharif for heart surger.