A BU Central performer died at Boston Medical Center Friday night after complaining of lightheadedness following his set the night before, witnesses at the show said. Last Lights lead singer Dominic Mallary was transported to BMC around 11 p.m. Thursday night, according to a Boston University Police Department report of the incident, about two hours after his band opened as the first act for the concert. He was 24 years old. Mallary had wrapped his microphone cord around his neck as part of his act, which Last Lights drummer Patrick Murphy said stopped the blood flow to the lead singer’s brain. ‘ ‘He seemed fine for at least an hour or two, but after the last band played, he said he was feeling faint and couldn’t feel his legs,’ he said. ‘When they arrived at the hospital, he started to go into seizures, and that’s when he lost consciousness.’ Murphy said Mallary, who sings music mostly from the hardcore genre, twisted his microphone cord around him for every show he performed, and that ‘it just happened to be this time’ that the act ended with a tragedy. Once at the hospital, Mallary was put on life support because he was unable breathe on his own, Murphy said. ‘They confirmed him basically brain-dead,’ he said. Operators at BMC would not provide Mallary’s official cause of death as of Sunday night. Mallary, a 2007 Emerson College graduate who majored in writing, literature and publishing, wrote all the music and lyrics for the band, Murphy said. ‘He was playing guitar his whole life,’ Murphy said. ‘Every band I’ve ever been in with him, he’s written all the music, and it’s just amazing. He was an original songwriter.’ Murphy said the music label Think Fast! had signed the band just two days before its performance at BU Central. Last Lights will not continue without Mallary despite a planned tour. ‘It shouldn’t have happened to him,’ Murphy said. ‘His band was doing good. Everything he worked for his entire life was finally coming true.’