Jack Zimmerman, MD, FCCM, discusses his article in the May 2006 edition of Critical Care Medicine, "Acute Physiology and Chronic Health Evaluation (or APACHE IV): Hospital Mortality Assessment for Today's Critically Ill Patients." Dr. Zimmerman is professor emeritus of anesthesia and critical care medicine at George Washington University Medical Center in Washington, D.C. (Critical Care Medicine Volume 34, Number 5, May 2006 pp 1297-1310)