Randomized, Double-Blind, Placebo-Controlled, Multi-Center, Sequential Cohort Study to Evaluate the Effect of SLV320 in Addition to Chronic Furosemide Treatment on Renal Function in Subjects With Congestive Heart Failure and Impaired Renal Function

This is a randomized, double-blind, placebo-controlled, multi-center, sequential cohort study in subjects with congestive heart failure (CHF) and impaired renal function who are on stable furosemide treatment (³ 40 mg daily). A total of 50 subjects will be randomized to each increasing dose level of SLV320 or placebo in a sequential fashion.