From the Washington Post, Thurs., Aug. 17, 1977:
Elvis Presley, who revolutionized American popular music with his earthy singing style and became a hero to two generations of rock 'n' roll fans, died yesterday in Memphis, Tenn. He was 42.
Shelby County Medical Examiner Dr. Jerry Francisco said last night an autopsy indicated Presley died of "cardiac arrhythmia," which he described as a "severely irregular heartbeat" and "just another name for a form of heart attack." He said the three-hour autopsy uncovered no sign of any other diseases -- though Presley had in recent years been treated at Baptist Memorial Hospital for hypertension, pneumonia and an enlarged colon -- and there was no sign of any drug abuse.
Presley’s body was discovered at 2:30 p.m. Memphis time by his road manager, Jerry Esposito, in a bathroom in the singer’s multimillion-dollar Graceland Mansion. He was rushed to the Baptist Memorial, where he was met by his personal physician, Dr. George C. Nichopoulos, and pronounced dead.
Why does it matter? Watch the YouTube. I've written about Elvis before, but the main point is that before Elvis, no white guy had sung like that. Kids were listening to doo wop and music incredibly tame by today's standards.
Elvis changed the direction of pop music. It's that simple.