A Phase IIb Study to Investigate the Efficacy and Tolerability of Lower Doses Cinaciguat (25 µg/h, 10 µg/h) Given Intravenously to Patients With Acute Decompensated Chronic Congestive Heart Failure (ADHF)

Inclusion Criteria:

Male and non-pregnant, non-lactating female subjects, age >/= 18 years of age; or women without childbearing potential defined as postmenopausal women aged 55 years or older, women with bilateral tubal ligation, women with bilateral ovariectomy, and women with a hysterectomy
Subjects must have the clinical diagnosis of Congestive Heart Failure (CHF) made at least three months prior to enrollment

Subjects must experience worsening of both of the symptoms below leading to hospitalization at the time of entry into the study:

dyspnea and
clinical evidence of volume overload

Exclusion Criteria:

Acute de-novo heart failure
Acute myocardial infarction and/or myocardial infarction within 30 days
Valvular heart disease requiring surgical intervention during the course of the study
Heart failure due to or associated with uncorrected primary valvular disease, malfunctioning artificial heart valve, or uncorrected congenital heart disease
Primary hypertrophic cardiomyopathy
Acute inflammatory heart disease, eg, acute myocarditis
Unstable angina requiring angiography