This book recapitulates the discussion on the worth of Coronary Care Units (CCUs), introduced with unprecedented speed between 1965 and 1975. Did they really substantially lower death from myocardial infarction, as was said by their proponents? Did the 'before and after'-research prove its value, being scientifically sound enough to justify the enormous investments in it? These are some of the questions explored here, as the book considers leading medics such as CCU-defender Bernard Lown or CCU-critic Ivan Illich.