Cardiopulmonary exercise testing is an important diagnostic test in pulmonary medicine and cardiology. Capable of providing significantly more information about an individual's exercise capacity than standard exercise treadmill or 6-minute walk tests, the test is used for a variety of purposes including evaluating patients with unexplained exercise limitation or dyspnea on exertion, monitoring disease progression or response to treatment, determining fitness to undergo various surgical procedures and monitoring the effects of training in highly fit athletes.Introduction to...