Journal
CLINICS IN GERIATRIC MEDICINE
Volume 31, Issue 3, Pages 507-+Publisher
W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1016/j.cld.2015.04.003
Keywords
Frailty; Sarcopenia; Hepatic encephalopathy
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Normal regulation of total body and circulating ammonia requires a delicate interplay in ammonia formation and breakdown between several organ systems. In the setting of cirrhosis and portal hypertension, the decreased hepatic clearance of ammonia leads to significant dependence on skeletal muscle for ammonia detoxification; however, cirrhosis is also associated with muscle depletion and decreased functional muscle mass. Thus, patients with diminished muscle mass and sarcopenia may have a decreased ability to compensate for hepatic insufficiency and a higher likelihood of developing physiologically significant hyperammonemia and hepatic encephalopathy.
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