The University of Toledo Translation Journal of Medical Sciences Internal Medicine Abstract, Department of Medicine Research Symposium UTJMS 2023 May 5; 11(1):e1-e1 Worsening Pericardial Effusion Despite Intensive Hemodialysis R. Royfman, M41*, A. Franz, M41, A. Grim, M31, M. Ali, MD1, M. Yassen, MD1, R. Assaly, MD2, L. Dworkin, MD1 1Division of Nephrology, Department of Medicine, The University of Toledo, Toledo, OH 43614 2Division of Pulmonary and Critical Care Medicine, Department of Medicine, The University of Toledo, Toledo, OH 43614 *Corresponding author: Rachel.royfman@utoledo.edu Published: 05 May 2023 End-stage renal disease affects over 500,000 people living in the United States. Complications of end- stage renal disease can include pericarditis and pericardial effusion. Treatment for renal disease is dialysis, and the most common type of dialysis is hemodialysis. Some patients are able to successfully complete peritoneal dialysis at home, which is more convenient. However, patient compliance plays an important role in making sure peritoneal dialysis remains a successful treatment. Hemodialysis is associated with an increased risk of bleeding compared to peritoneal dialysis. In our case presentation, we discuss a 31 year old male developing a hemorrhagic pericardial effusion after undergoing an emergent transition from peritoneal dialysis to hemodialysis with heparin administration in the setting of worsening uremia during two separate hospital admissions less than one month apart. The patient had a pericardial effusion of 2.4 cm without tamponade physiology during his first admission, and upon the second admission the effusion grew to 5.75 cm with tamponade physiology. He had the fluid drained and showed significant clinical improvement. We will further discuss how urgent transition from peritoneal dialysis to hemodialysis with heparin use can worsen a hemorrhagic pericardial effusion. https://dx.doi.org/10.46570/utjms.vol11-2023-715 https://dx.doi.org/10.46570/utjms.vol11-2023-715 mailto:Rachel.royfman@utoledo.edu