McCullough experienced a heart attack Monday night, reports The Independent, saying the 69-year-old guitarist from Portstewart, Northern Ireland, is being treated at Causeway Hospital in Coleraine, Northern Ireland.

Having joined Wings in 1971, one of McCullough’s most memorable moments in that band was his guitar solo on the song “My Love.” He also played lead on “Hi, Hi, Hi” and “Live & Let Die.”

McCullough place in rock history isn’t totally centered on his guitar playing. It’s his voice on Pink Floyd’s Dark Side Of The Moon album saying the immortal line, “I don’t know. I was really drunk at the time.”