Safety and Efficacy of ANX-042 in Human Cardiorenal Syndrome

Inclusion Criteria: * Left ventricular ejection fraction of equal or less than 40% assessed by echocardiography, nuclear scan, MRI or left ventriculogram within the past 48 months. If assessment is greater than 12 months old, hand-held echocardiogram (ECHO) determination will be performed at consent visit once enrolled. * Stable New York Heart Association (NYHA) class II and III symptoms as defined by: no change in NYHA symptoms over the past 3 months, on stable doses of furosemide, angiotensin-converting enzyme (ACE) inhibitor or angiotensin II type 1 (AT1) blocker, beta blocker, or aldosterone antagonist over the last 4 weeks and no episode of decompensated Congestive Heart Failure (CHF) over the past 6 months. * Calculated creatinine clearance of equal or less than 89 ml/min and greater than 20 ml/min, using the Modification of Diet in Renal Disease (MDRD) formula assessed within the past 48 months and a confirmatory calculated creatinine clearance equal or less than 89 ml/min and greater than 20 ml/min at the time of enrollment. * Digoxin, antiarrhythmic medications and other vasodilators will be allowed; however, all medications must be at stable doses 4 weeks prior to enrollment. Subjects taking non-steroidal anti-inflammatory drugs (NSAIDs), except aspirin, will not be able to increase their medication dose for the duration of the study. Exclusion Criteria: * Prior diagnosis of intrinsic renal diseases, such as glomerular nephritis or polycystic kidney disease, incl…