Electrocardiographic observations on the tuatara, Sphenodon punctatus

1. 1. Electrocardiograms were obtained from two unrestrained tuataras at body temperatures from 7 to 26°C. 2. 2. Heart rates were lower than previously reported for resting Sphenodon, but were similar to resting rates of large lizards. 3. 3. EGG intervals (P–R, R–T, P i –T f ) did not differ greatly...

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