Carmichael died of heart failure at the Eisenhower Medical Center in Rancho Mirage, California, on December 27, 1981, at the age of 82. His remains are buried in Rose Hill Cemetery in Bloomington, Indiana. In 1986 Carmichael's family donated his archives, piano, and memorabilia to his alma mater, Indiana University, which established a Hoagy Carmichael Collection in its Archives of Traditional Music and the Hoagy Carmichael Room to permanently display selections from the collection. Carmichael is considered to be among the most successful of the Tin Pan Alley songwriters of the 1930s, and was among the first singer-songwriters in the age of mass media to exploit new communication technologies, such as television and the use of electronic microphones and sound recordings. American composer and author Alec Wilder described Carmichael as the "most talented, inventive, sophisticated and jazz-oriented of all the great craftsmen" of pop songs in the first half of the 20th century. Carmichael was an industry trailblazer, who recorded varied interpretations of his own songs and provided material for many other musicians to interpret. His creative work includes several hundred compositions, some of them enduring classics, as well as numerous sound recordings and appearances on radio and television and in motion pictures. Music historian Ivan Raykoff described Carmichael as "one of America's most prolific songwriters" and an "iconic pianist" whose work appeared in more than a dozen Hollywood films, including his performances in classic films such as To Have and To Have Not and The Best Years of Our Lives. Among the hundreds of Carmichael's published songs, "Stardust" is one of the most frequently recorded. Carmichael's greatest strength was as a melodist, but he also became known as an "experimental" and "innovative" songwriter, whose "catchy, often jazz-infused, melodies" and "nostalgic, down-home lyrics" were memorable and had wide public appeal, especially with mass media promotion and through the efforts of numerous entertainers who performed his songs.

Answer this question "How did he die?" by extracting the answer from the text above.
Carmichael died of heart failure at the Eisenhower Medical Center in Rancho Mirage, California, on December 27, 1981, at the age of 82.