Family, friends and fans now know the reason for Alan Thicke's sudden death. On Dec. 13, the Growing Pains icon was playing hockey, a favorite pastime, with his 19-year-old son Carter at Pickwick Gardens ice rink in Burbank, Calif. when he suffered the heart attack. The 69-year-old actor died from a "ruptured aorta" and a "standard type A aortic dissection," his official death certificate revealed, as confirmed by People. His certificate also said he died just minutes after the rupture, even though he was immediately transported to a Providence St. Joseph's Medical Center. He was pronounced dead at the hospital that afternoon. A source shared with E! News, "Alan was healthy and his heart attack was a complete shock,".