Duluth football coach undergoes complex heart surgery after going in for checkup

When he exercised, Mark Nachtsheim tried to ignore the tightness he felt in his throat and the difficulty he had breathing. “I kind of worked through it for about a month and a half and finally decided I’d go see my doctor and say: This isn’t right,” Nachtsheim related. “And he agreed.”

By: John Lundy, Duluth News Tribune