EVALUATION OF COUGH IN DOGS WITH MITRAL-VALVE INSUFFICIENCY

Distinguishing between respiratory and cardiac causes of coughing in dogs is critical to successful treatment. Such a distinction is especially important in older, small-breed dogs, which often experience both chronic respiratory disease and mitral valve insufficiency. Cough most commonly results from upper airway disease, tracheobronchial disease, pulmonary fibrosis, pulmonary neoplasia, pneumonia, and cardiac disease. Using historical and physical findings in conjunction with routinely available ancillary diagnostic procedures, the cause of cough can usually be determined and often effectively treated. Special diagnostic tests routinely available in general practice include conventional thoracic radiographs supplemented by expiratory lateral thoracic and inspiratory lateral cervical views to evaluate airway stability, electrocardiography, transtracheal aspiration with culture and sensitivity as well as cytologic evaluation, serology, specialized fecal examinations, and fine-needle aspiration of the lung.