He underwent heart surgery at the Gangnam Severance Hospital earlier this month after showing difficulty in breathing, the family said.
Hwang, a former professor of Yonsei University's Severance Hospital, is the author of a 1997 best-selling book, titled “Sinbaram (Excitement) Therapy.” He also worked as a senior advisor for the ruling Saenuri Party.
He is survived by his wife, Sohn Jeong-ja, two daughters and one son.
Funeral will be held at the hospital on Jan. 1.
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