Used as a selective phosphodiesterase III inhibitor in the treatment of acute heart failure. It helps improve cardiac output by increasing myocardial contractility and inducing vasodilation. Commonly administered intravenously in hospital settings to support patients with impaired heart function, especially when conventional therapies are insufficient. Its action reduces pulmonary capillary wedge pressure and systemic vascular resistance, leading to improved hemodynamics. Often used short-term due to concerns over long-term safety and potential arrhythmogenic effects.