I would like to thank McGraw-Hill for believing in the concept of teaching by clinical cases. I owe a great debt to Catherine Johnson, who has been a fantastically encouraging and enthusiastic editor. It has been amazing to work together with my daughter Allison, who is a senior nursing student at the Scott and White School of Nursing; she is an astute manuscript reviewer and already in her early career she has a good clinical acumen and a clear writing style. At St. Joseph Medical Center, I would like to recognize our outstanding administrators: Pat Mathews, and Drs. Thomas Taylor and John Bertini. At Methodist Hospital, I appreciate Drs. Mark Boom, Judy Paukert, and Alan Kaplan. and I appreciate Linda Bergstrom's advice and assistance. Without the help from my colleagues, Drs. Konrad Harms, Priti Schachel, and Gizelle Brooks-Carter, this manuscript could not have been written. Most importantly, I am humbled by the love, affection, and encouragement from my lovely wife Terri, and our children: Andy and his wife Anna, Michael, Allison, and Christina.