- This study explores the parallel histories of the Mayo Clinic, the care of patients with heart disease, and specialization in cardiology during the twentieth century. Chapters are devoted to such technologies as open-heart surgery, coronary angiography, and echocardiography, and to the key individuals, instituions, and innovations that played vital roles in the technologies that transformed heart care.--From publisher description. Contents : The nineteenth-century origins of the Mayo practice -- The Mayo's invention of multispecialty group practice -- The development of an academic medical center in Rochester -- Patient care and clinical research in the 1920s -- The electrocardiograph and the birth of cardiology -- Challenges and changes during the Depression -- President Roosevelt's secret hypertensive heart disease -- The reinvention of the American Heart Association and the invention of cardiac catheterization -- Surgeons begin trying to treat heart disease -- Pioneering open-heart surgery at the University of Minnesota and the Mayo Clinic -- The expansion of open-heart surgery and cardiac catheterization -- Beyond mid-century : two decades of growth and change -- Creating coronary care units and empowering nurses -- Coronary angiography : the Cleveland Clinic leads the way -- Coronary artery bypass surgery stimulates the growth of angiography -- Transforming cardiac catheters into treatment tools -- Analyzing and managing abnormal heart rhythms -- Seeing the heart : echocardiography and other imaging technologies -- Treating heart failure and preventing cardiovascular disease -- Challenges and opportunities around the new millennium.