Optimal Balance Alfapump® System Feasibility Study

Inclusion Criteria * Males or females ≥ 18 years and \< 80 years of age * Patients exhibiting physical signs of excessive fluid retention (i.e. elevated JVD, peripheral edema, ascites, pulmonary edema, weight gain etc.) * Patients with an eGFR by the Modification of Diet in Renal Disease (MDRD) of \> 15 to \< 60 mL/min/1.73m2 * Patients with a brain natriuretic peptide (BNP) ≥ 150 pg/mL and/or N-terminal prohormone of brain natriuretic peptide (NT-proBNP) ≥ 600 pg/mL at time of screening or BNP ≥ 100 pg/mL and/or NTproBNP ≥ 400 pg/mL * Patients who have a Six Minute Walk Test (SMWT) exercise capacity between 100 and 400 meters * Patients presenting with NYHA Class III or ambulatory NYHA Class IV heart failure who have been on optimal medical management (OMM) based on current heart failure practice guidelines and who are failing to respond to or cannot tolerate one or more of the following interventions: 1. Treatment with diuretic therapy 2. Treatment with angiotensin converting enzyme (ACE) inhibitors or angiotensin receptor blockers (ARBs) for at least 30 days 3. Treatment with nitrates and/or vasodilators at the investigator's discretion 4. Treatment with beta-blockers for at least 90 days 5. Treatment with cardiac resynchronization therapy (CRT) 6. Treatment with an automatic implantable cardioverter defibrillator (AICD) * Patients who demonstrate compliance with the current medical regimen as reported by the treating physician Enrollment Exclusion Criteria * Patients presenting with acute decompensated heart failure requiring hospitalization for management of their symptoms (i.e. hospitalization for exacerbation of chronic heart failure manifested by signs and symptoms requiring intravenous and/or more aggressive therapy) * Patients with ascites on physical examination resulting predominantly from right heart failure * Patients who have an indication for and are candidates for CRT but who have not been treated with CRT * Patients who have an indication for and are candidates for an AICD but who have not been implanted with an AICD * Patients with reversible causes of heart failure which may be remedied by conventional surgery or other interventions * Patients with an eGFR by MDRD \< 15 or \> 60 ml/min/1.73m2 * Patients with a body mass index (BMI) \< 18 kg/m2or \> 35 kg/m2 * Patients with severe pulmonary disease by history (i.e. severe chronic obstructive pulmonary disease, severe hypoxia or a pulmonary artery mean pressure \>40 mm Hg) * Patients who have experienced a myocardial infarction (MI) within the past 90 days * Patients who have experienced a cerebrovascular accident (CVA) or transient ischemic attack (TIA) within the past 90 days * Patients who have undergone cardiac surgery or other major surgery within the past 90 days * Patients who are candidates for and require a concomitant surgical procedure \[i.e. coronary artery bypass graft (CABG), valvular surgery, etc. * Patients who are candidates for and require temporary or durable mechanical circulatory support \[i.e. intra-aortic balloon pump (IABP), ventricular assist device (VAD), extracorporeal membrane oxygenation (ECMO)\] * Patients with confirmed untreated abdominal aortic aneurysm (AAA) \> 5 cm in diameter diagnosed within the past six months * Patients with active systemic or uncontrolled infections * Patients who are pregnant (Note: Negative pregnancy test will be required in all women - Patients with known alcohol or illicit drug abuse or dependence within the previous three months * Patients who are currently enrolled or who have participated in the past 30 days in another therapeutic and/or interventional clinical study * Patients with technical obstacles that pose an inordinately high surgical risk in the judgment of the Investigator * Patients who have any underlying condition that, in the opinion of the Investigator, would disqualify the patient for inclusion in the study, limit survival to less than one year, or not permit valid consideration