![]() ![]() Six-lead ECG and an atropine response test were performed. A serum electrolyte panel revealed hyperlactatemia (7.6 mmol/L reference interval, 0 to 2.5 mmol/L) with no other notable electrolyte disturbances. Three-view thoracic radiographic findings included mild generalized cardiomegaly and a mild diffuse interstitial pulmonary pattern, which were considered likely age-related changes there was no evidence of cardiac decompensation or clear suspicion of pulmonary fibrosis. On physical examination at the veterinary medical teaching hospital, findings included dull mentation, a grade II/VI left apical systolic murmur, bradycardia (heart rate, 36 beats/min) with an irregular cardiac rhythm. Despite terbutaline administration, the dog continued to have syncopal episodes and was referred for possible pacemaker implantation. After a diagnosis of SSS was made, theophylline administration was discontinued and terbutaline sulfate was prescribed at a dosage of 0.34 mg/kg (0.15 mg/lb) orally every 12 hours. ![]() The dog's history included chronic cough (presumed breed-related pulmonary fibrosis) for which theophylline (unknown dosage) was prescribed. Transthoracic echocardiography revealed mild myxomatous mitral and tricuspid valve degeneration without cardiac chamber enlargement (American College of Veterinary Internal Medicine classification 1 stage B1) as well as mild pulmonary hypertension. At that time, results of a CBC and serum biochemical analysis were within reference intervals. Three days earlier, the dog had multiple collapse episodes periods of sinus arrest were detected during an ECG examination. A14-year-old 7.3-kg (16.1-lb) spayed female West Highland White Terrier was evaluated at a veterinary medical teaching hospital for possible pacemaker implantation to treat suspected sick sinus syndrome (SSS). ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |