The metal frontman died from an apparent heart attack.
Doctors are “optimistic” the Grammy winner will make a speedy recovery.
The musician, who was still an active member of UFO, died of a heart attack.
Studio pioneer worked on seminal albums like Sgt. Pepper’s Lonely Hearts Club Band, The White Album, and Revolver.
The 47-year-old director had “100% blockage of my LAD artery.”
Iconic actress and Star Wars star suffered heart attack on flight from London to Los Angeles.
Alexander previously suffered a heart attack in 2014.