From this Science Daily article Eating Your Greens Could Prove Life-saving If A Heart Attack Strikes:
Dennis Johnson died today at age 52 of a heart attack. DJ was the head coach for the Austin Toros basketball team and a member of the last Boston Celtics dynasty, one of the greatest teams in NBA history. He was a great player during the golden era of NBA history. He will be remembered by basketball fans for one of the most memerable shots ever in the NBA playoffs.