Yngve Falck-Ytter

Case Western Reserve University, Cleveland, Ohio, United States

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Publications (5)41.63 Total impact

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    ABSTRACT: The effect and applicability of interferon-based antiviral therapies in the general population of persons with hepatitis C virus (HCV) infection are unknown. To determine the applicability and usefulness of anti-viral therapy in a metropolitan clinic population. Retrospective case series of consecutively referred patients. A teaching county hospital in Cleveland, Ohio. 327 patients referred to a liver clinic after a positive result for antibody against HCV on enzyme-linked immunosorbent assay (ELISA). Treatment rates; reasons for nontreatment. 34 patients had no detectable HCV RNA. Of the remaining 293 patients, 72% were not treated for the following reasons: 37% did not adhere to evaluation procedures, 34% had medical or psychiatric contraindications, 13% had ongoing substance or alcohol abuse, 11% preferred no treatment, and 5% had normal liver enzyme levels. Only 83 patients (28%) were treated; 13% had a sustained viral response. Most patients with HCV infection are not candidates for interferon-based therapies; alternative interventions should be sought for these patients.
    Annals of internal medicine 03/2002; 136(4):288-92. · 16.10 Impact Factor
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    ABSTRACT: Nonalcoholic steatohepatitis, along with other forms of nonalcoholic fatty liver disease, is a chronic liver disease that is attracting increasing significance. It is a clinicopathologic syndrome that was originally described in obese, diabetic females who denied alcohol use but in whom the hepatic histology was consistent with alcoholic hepatitis. This typical patient profile has been expanded and is now recognized to occur even in normal weight males without overt abnormalities in carbohydrate metabolism. Although originally believed to be a benign clinical entity, nonalcoholic steatohepatitis is now recognized as a cause of progressive fibrotic liver disease with adverse clinical sequelae. It is important to emphasize that nonalcoholic steatohepatitis is best considered one type of a larger spectrum of nonalcoholic fatty liver disease that is a consequence of insulin resistance and ranges from fat alone to fat plus inflammation, fat plus ballooning degeneration, and nonalcoholic steatohepatitis, the latter being the most serious form. As with any disease, the clinical importance of nonalcoholic steatohepatitis is related to its prevalence and natural history. Recent studies using different methodologies indicate that in the general population the prevalence of fatty liver and nonalcoholic steatohepatitis is approximately 20% and 3%, respectively. These prevalence rates are increased in certain subpopulations such as obesity and type II diabetes. Of greater concern is the recognition that cirrhosis and liver-related deaths occur in approximately 20% and 8% of these patients, respectively, over a 10-year period. Risk factors for these adverse clinical symptoms include patients older than the age of 45, the presence of diabetes or obesity, an aspartate aminotransferase/alanine aminotransferase ratio > 1 and hepatic histology. However, a number of important unresolved issues must be clarified before the true natural history of this disease can be fully understood.
    Seminars in Liver Disease 01/2001; 21(1):17-26. · 5.12 Impact Factor
  • Yngve Falck-Ytter, Arthur J. McCullough
    The American Journal of Gastroenterology 10/2000; 95(9):2156-9. · 9.21 Impact Factor
  • Yngve Falck-Ytter, Arthur J McCullough
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    ABSTRACT: Alcohol is the most frequently used drug worldwide and remains a socially acceptable hepatotoxin. Although the toxic effects of alcohol on various organs (liver, pancreas, heart, and intestine) are well recognized, the role of alcohol in overall energy and protein metabolism is less well understood. In particular, the efficiency of alcohol as a source of calories and as a substrate for energy production appears to be influenced by the amount of both alcohol and fat consumption as well as by gender. The relationship between alcohol intake and body weight is complex, but it is a clinical dilemma with important nutritional implications for weight management in addition to specific organ toxicity.
    Current Gastroenterology Reports 09/2000; 2(4):331-6.
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    Arthur J. McCullough, Yngve Falck-Ytter
    Hepatology 05/1999; 29(4):1328-30. · 11.19 Impact Factor