Understanding why some heart failure patients don't respond to water pills

This research study is investigating why some people with heart failure stop responding well to diuretic medications—commonly called water pills—that help remove excess fluid from the body. Researchers will give you bumetanide, a loop diuretic, in several different doses over a few weeks and measure how your kidneys respond to each dose. By understanding these patterns, doctors hope to develop better strategies to help heart failure patients who have become resistant to these medications.

Many heart failure patients develop what's called diuretic resistance, where the medication becomes less effective at removing excess fluid from the body. This study exists to understand the biological reasons why this happens, so that doctors can eventually find better ways to treat patients and prevent this resistance from developing.