At thirteen, Kye Anderson lost her father to undiagnosed heart disease. The diagnostic gap became her life's work. For readers building anything that matters - companies, careers, lives - this book offers both the example of a remarkable American entrepreneur and the framework she earned through forty years of practice. Purpose, Passion, Perseverance is at once a both a text book and a memoir of medical innovation; a candid account of building and losing and building again; and an argument for why prevention deserves to be the next frontier of healthcare.