Reversible Hyponatremia Related to Pericardial Tamponade Rehan Shafique, MD, Salman Sarwar, MD, Barry M. Wall, MD, C. Robert Cooke, MD  American Journal of Kidney Diseases  Volume 50, Issue 2, Pages 336-341 (August 2007) DOI: 10.1053/j.ajkd.2007.04.019 Copyright © 2007 National Kidney Foundation, Inc. Terms and Conditions

Figure 1 Urine output before and after pericardiocentesis. American Journal of Kidney Diseases 2007 50, 336-341DOI: (10.1053/j.ajkd.2007.04.019) Copyright © 2007 National Kidney Foundation, Inc. Terms and Conditions

Figure 2 Serum sodium concentration before and after pericardiocentesis. To convert sodium in mEq/L to mmol/L, multiply by 1. American Journal of Kidney Diseases 2007 50, 336-341DOI: (10.1053/j.ajkd.2007.04.019) Copyright © 2007 National Kidney Foundation, Inc. Terms and Conditions

Figure 3 (Left) Chest radiograph on admission shows characteristic “water bottle” appearance of the heart consistent with large pericardial effusion. (Right) Chest radiograph 2 weeks after discharge from the hospital, at which time the patient was asymptomatic with normal blood pressure and normal serum sodium concentration. American Journal of Kidney Diseases 2007 50, 336-341DOI: (10.1053/j.ajkd.2007.04.019) Copyright © 2007 National Kidney Foundation, Inc. Terms and Conditions

Figure 4 Compensatory mechanisms activated by arterial underfilling in pericardial tamponade and other causes of low cardiac output. (Reprinted with permission from Am J Med.5) American Journal of Kidney Diseases 2007 50, 336-341DOI: (10.1053/j.ajkd.2007.04.019) Copyright © 2007 National Kidney Foundation, Inc. Terms and Conditions