Congestive heart failure (CHF) is a very common condition in which the heart becomes increasingly ineffective at pumping blood and fluid backs up and leaks into the lungs and other tissues. It is a very frequent cause of hospitalization. Diuretics (medications that remove fluid from the body by increasing the volume of urine produced) have been the mainstay of acute treatment, and in the last few years other medications such as beta blockers, ACE inhibitors, and aldosterone blockers have been sh...