LONDON: Pakistan’s Prime Minister Nawaz Sharif successfully underwent open heart surgery in London on Tuesday, his daughter said. It was the 66-year-old premier’s second major cardiac medical procedure in five years. “Surgery successful by The Grace Of Almighty,” his daughter Maryam Nawaz Sharif said on Twitter. “All arteries successfully grafted,” she told her nearly two million followers. She posted a picture of Sharif lying in an intensive care unit bed with his eyes closed and said he was “stable”. The London hospital where the procedure was carried out was not officially named. Sharif’s surgery lasted around four hours, according to his daughter’s tweets. He is expected to stay in hospital for around a week to recover before traveling home.