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Hepatorenal syndrome

Background

Overview

Definition
HRS is a severe complication of advanced liver disease, characterized by progressive renal failure in response to circulatory and hemodynamic alterations.
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Pathophysiology
The pathophysiology of HRS involves intense renal vasoconstriction, systemic and splanchnic arterial vasodilation, and reduced cardiac output, leading to renal dysfunction.
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Epidemiology
The prevalence of HRS-AKI in hospitalized patients with cirrhosis and refractory ascites is about 11%.
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Risk factors
HRS develops in patients with advanced liver disease, with risk factors including advanced liver cirrhosis with ascites, marked circulatory dysfunction, portal hypertension, SBP, severe alcoholic hepatitis, and specific triggers such as bacterial infections, nephrotoxic drugs, fluid loss, and large-volume paracentesis.
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Disease course
HRS is classified into two types: type 1 HRS is characterized by a rapid and progressive impairment in renal function, while type 2 HRS is characterized by a stable or less progressive impairment in renal function. The decline in renal function seen in HRS is consistent with AKI.
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Prognosis and risk of recurrence
The prognosis of HRS is extremely poor, especially for those with a rapidly progressive course. The median survival of patients with HRS without liver transplantation is < 6 months.
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Guidelines

Key sources

The following summarized guidelines for the evaluation and management of hepatorenal syndrome are prepared by our editorial team based on guidelines from the American Gastroenterological Association (AGA 2023), the American College of Gastroenterology (ACG 2022), the American Association for the Study of Liver Diseases (AASLD 2021,2017,2014), the Society of Critical Care Medicine (SCCM 2020), and the European Association for the ...
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