Acute necrotising pulmonary vasculitis and pulmonary hypertension in a juvenile dog
N J Russell1, P J Irwin, B J Hopper
1School of Veterinary & Biomedical Sciences, Division of Health Sciences, School of Veterinary Clinical Science, Murdoch University, South Street, Murdoch, Western Australia 6150, Australia.
Abstract:
A five-month-old female Jack Russell terrier was presented for investigation of acute lethargy, anorexia, coughing, respiratory distress and weakness. Examination findings included cyanosis, a grade 3 of 6 systolic heart murmur and prolonged capillary refill time. Radiography and echocardiography revealed severe pulmonary hypertension, cor pulmonale and right-sided heart failure. Indirect measurement of the systolic pulmonary artery pressure estimated pressures over 100 mmHg. Despite treatment the patient died. Post-mortem examination did not identify a congenital cardiovascular anomaly. Histopathology confirmed acute necrotising pulmonary arteritis and immunohistochemistry failed to identify any immune complex or complement deposition.
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