Peritoneal Ultrafiltration in Cardio Renal Syndrome

The study will include adults HFrEF patients, that despite guidelines directed medical therapy still retain a congestive heart failure (HF) picture. During the study, patients should remain on their prescribed heart failure medications and the same dosing schedule for the duration of the study unless investigators determine medically necessary to change. Patients will be assigned randomly to receive either PolyCore PUF (over the top of their prescribed heart failure medications), for 6 months, or to the control arm receiving stable medical therapy according to international guidelines and comprehensive of loop diuretic (furosemide) dose till to 2.5mg/kg/day, without PUF therapy. The PUF ultrafiltration will be performed with a single nightly exchange, with 2 liters PolyCore solution, lasting 12‐14 hours, for 6 months. An independent data safety monitoring board (DSMB) will be convened for this study and will review the results of the trial at regular intervals to protect patients participating in the study. An adaptive interim analysis will be performed when in each group 20 patients have completed 6 months in the study, for analysis of the primary outcome. The purpose of the adaptive interim analysis is to calculate the final study sample size.The DSMB will closely examine the interim primary efficacy results, respecting the confidentiality and integrity of data, to investigate the final sample sizes necessary to complete the study.