The Impact of Cardio Renal Syndrome (CRS) in Renal Transplant Recipients: A Systematic Review

Cardiovascular disease is a major cause of morbidity and mortality in patients with CKD. This risk is increased fivefold in renal transplant patients when compared to an age-matched population. This study aims to explore and focus on the risk factors, management, and outcomes of cardiorenal syndrome in renal transplant recipients and to estimate its deleterious effect on the heart and renal allograft, opening the door for future randomized clinical trials to look at the problem in more depth. The current literature has little information and data on the impact of cardiorenal syndrome on the renal allograft and heart regardless of the specific type of cardiorenal syndrome. Renal transplant recipients can develop any one of the five types of the cardiorenal syndrome because of having both conventional and established risk factors for developing CRS. These risk factors particularly the established ones or best described as non-traditional risk factors such as immunosuppressive medications, acute renal allograft rejection, suboptimal renal allograft function, anemia, infections, proteinuria, and hyperparathyroidism are usually neglected after renal transplantation. Although the prevalence of CRS is low among renal transplant recipients, we believe that is due to under diagnosis and lack of clinical trials leading to a knowledge gap in this subject area. Methodology: The present study conducted a systematic literature review and selected four Clinical trials of CRS in renal transplant recipients for datasets analysis to gain more knowledge about the risk factors contributing to CRS in renal transplant recipients and to produce a strategy to prevent CRS and manage such patients better. Results: This systematic review of the current literature revealed that the presence of non-traditional risk factors post-renal transplantation when combined with traditional risk factors can significantly increase the risk of developing CRS where the prognosis is almost always poor in such patients. The study also showed no difference in the preventive measures and management of CRS between renal transplant recipients and non-renal transplant recipients. Conclusion: Renal transplant recipients are at increased risk of developing CRS with poor outcomes compared to non-renal transplant recipients because of the additional non-traditional risk factors post-renal transplantation. However, the preventive measures and management of CRS in renal transplant recipients are similar to those used for the general population but more attention should be paid to the correction of non-traditional risk factors.