Nobel Peace Prize laureate Narges Mohammadi is in critical condition in Iran, according to her family, who accuse authorities of denying the detained activist urgent cardiac treatment. Narges Mohammadi’s brother, Hamidreza, tells TIME that his sister is suffering from a condition known as Prinzmetal angina, which causes spasms in the coronary arteries and can trigger heart attacks and other serious complications. "We are really worried that Narges's heart will stop beating," he says during a