Study to Compare the Effects of Two Dosages of Tolvaptan in Congestive Heart Failure Patients

Central Cardiology Medical Clinic, Bakersfield

University of California-San Diego, San Diego

University of Miami/Jackson Memorial Hospital, Miami

Medical Research Institute, Slidell

Androscoggin Cardiology Associates, Auburn

University of Missouri-Kansas City School of Medicine, Kansas City

Saint Louis University, St Louis

Cardiology of Oklahoma, Tulsa

Medical University of South Carolina, Charleston