Harrison RL, Clark L, Corletto F.
Davies Veterinary Specialists, Higham Gobion, UK.
Vet Anaesth Analg 2012;39:230–5.
Editor’s note: Bradycardia during anaesthesia can potentially be detrimental in dogs, as low cardiac output may result in systemic hypotension and reduced coronary perfusion. Although it was previously believed that heart rate is inversely proportional to body size, recent studies have demonstrated that such a correlation does not exist in dogs. Many veterinary anaesthetists believe that Dachshunds may be at a higher risk of developing bradycardia during anaesthesia compared with other dog breeds. In this retrospective clinical study, the mean heart rate in 61 Dachshunds was compared with that in 62 dogs of other breeds weighing <10.5 kg. The potential effects of other variables on heart rate during anaesthesia were also investigated. All dogs underwent general anaesthesia for spinal diagnostic magnetic resonance imaging.