Breathing disorders are one of the most common problems, bringing patients to doctors' offices. The causes are diverse, ranging from anxiety to specific diseases of the brain, heart, lungs, and nasal and throat passages. The Breathing Disorders Sourcebook is an extensive guide to the causes, symptoms, and treatments for different types of breathing disorders. It explores the normal mechanisms involved in the act of breathing as well as what can go wrong, and describes what to expect during the medical evaluation.