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  • Title: Pulmonary hypertension and right-sided heart failure in an adult llama with hepatic disease.
    Author: Middleton JR, Chigerwe M, Fine DM, Turk JR, Lattimer JC.
    Journal: J Am Vet Med Assoc; 2006 Mar 01; 228(5):756-9. PubMed ID: 16506943.
    Abstract:
    CASE DESCRIPTION: A 13-year-old llama was examined because of lethargy, inappetence, and syncope. CLINICAL FINDINGS: Physical examination revealed muffled heart and lung sounds and peripheral edema. Clinicopathologic abnormalities included lymphopenia, hyperglycemia, prerenal azotemia, mild hyponatremia, mild hypoalbuminemia, and high gamma-glutamyltransferase and creatine kinase activities. On ultrasonography, the liver appeared hyperechoic and ascites and pleural effusion were seen. Echocardiography revealed severe dilatation of the right atrium, right ventricle, and pulmonary artery; severe tricuspid regurgitation; and high right ventricular systolic pressure consistent with right-sided heart failure secondary to pulmonary hypertension. TREATMENT AND OUTCOME: Treatment with furosemide was attempted, but because of failing health, the llama was euthanized 4 weeks later. Macronodular cirrhosis of the liver, glomerulonephritis, and intimal fibrosis and medial hypertrophy of muscular pulmonary arteries were seen on histologic examination of postmortem specimens. CLINICAL RELEVANCE: Findings in this case were similar to those reported for human patients with portopulmonary hypertension secondary to hepatic cirrhosis. Pulmonary hypertension secondary to hepatic disease should be considered in the differential diagnosis of right-sided heart failure.
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