Hepatitis hipóxica / Hypoxic hepatitis

ABSTRACT

Hypoxic hepatitis (HH), or ischemic hepatitis occurs in the context of cardiac, circulatory or respiratory failure and is characterized by a sharp increase in serum aminotransferase levels due to anoxic necrosis of centrilobular liver cells. It is frequently observed in the ICU and has been associated to increased patient morbidity and mortality. Hepatic ischemia in the presence of a shock state is the main hemodynamic mechanism. However, other hemodynamic mechanisms of hypoxia, such as hepatic passive congestion, arterial hypoxemia and tissue dysoxia play an important role. Shock state is observed in only 50 percent of the cases. HH therapy of depends primarily on the nature of the underlying condition. Patients with HH have poor prognosis with more than 50 percent of mortality during the hospital stay.

RESUMEN

Hepatitis hipóxica (HH) o hepatitis isquémica se presenta en el contexto de insuficiencia cardíaca, respiratoria o circulatoria y se caracteriza por aumento brusco de transaminasas debido a la necrosis por anoxia de las células centrilobulillares del hígado. La HH es frecuente en UCI y está asociada a un aumento en la morbilidad y mortalidad. La isquemia hepática por un estado de shock es la principal causa. Sin embargo, mecanismos de hipoxia como la congestión pasiva del hígado, hipoxemia arterial y disoxia tisular juegan un importante rol. Se shock observa en sólo 50 por ciento de los casos. El tratamiento depende primariamente de la causa subyacente. Los pacientes con HH tienen un mal pronóstico con más de 50 por ciento de mortalidad intrahospitalaria.