RESUMO
OBJECTIVES: The goal of this study was to evaluate the static electrocardiograms of clinically healthy black-tailed prairie dogs (Cynomys ludovicianus), and suggest normal values. ANIMALS: Thirteen clinically healthy black-tailed prairie dogs were included in the study. They were anesthetized for physical examination, and complete laboratory data including troponin I concentration, thoracic radiographs, echocardiograms, and static ECG were recorded. MATERIAL AND METHODS: Static electrocardiograms were recorded using standard, six-limb leads from each of the 13 apparently healthy prairie dogs. Each prairie dog was anesthetized with isoflurane via facemask. Electrocardiograms were recorded in right lateral recumbency. The data were retrospectively analyzed. Lead II was used for waveform analysis. RESULTS: The median heart rate was 250 bpm (range 147-320). Median P-wave amplitude was 0.05 mV (range 0.01-0.06) and P-wave duration was 0.03 s (range 0.02-0.03). The PR interval was 0.06 s (range 0.04-0.06). The R-wave amplitude was 0.5 mV (range 0.1-1.15) and the QRS duration was 0.02 s (range 0.02-0.03). The QT interval was 0.12 s (range 0.1-0.14). Sixty-two percent of the QRS complexes were of Rs configuration. CONCLUSIONS: Static electrocardiograms can be performed and evaluated in anesthetized prairie dogs. This report provided normal values in clinically healthy black-tailed prairie dogs.
