Cardiac arrhythmias associated with acute major haemorrhage during craniectomy in a dog |
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Authors: | Alexandra Ha Dugdale MA VetMB Cert. VA |
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Affiliation: | Animal Health Trust, Lanwades Park, Kentford, Newmarket, Suffolk, CB8 7UU, UK |
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Abstract: | An estimated 43% of total blood volume was lost during craniectomy in a 32-kg Labrador retriever. One episode of bradycardia, followed by ventricular tachycardia occurred during surgery when the rate of haemorrhage exceeded fluid replacement. Sinus rhythm was re-established with intravenous lidocaine (1.25 mg kg−1). Twenty-four hours later, premature ventricular complexes appeared followed by episodes of ventricular tachycardia, some requiring lidocaine treatment. Myocardial hypoxia resulting either from hypovolaemia and/or air embolism (the right transverse venous sinus was damaged during surgery) may have caused the arrhythmias. Mild intracranial hypertension may have aggravated the problem. |
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Keywords: | Cardiac arrhythmias craniectomy hypovolaemia. |
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