Resting and maximal heart rates in ectothermic vertebrates.

@article{Lillywhite1999RestingAM,
  title={Resting and maximal heart rates in ectothermic vertebrates.},
  author={Harvey B Lillywhite and Kevin C. Zippel and Anthony Peter Farrell},
  journal={Comparative biochemistry and physiology. Part A, Molecular & integrative physiology},
  year={1999},
  volume={124 4},
  pages={
          369-82
        }
}
Resting and maximal heart rates (HR) in ectothermic vertebrates are generally lower than those in endotherms and vary by more than an order of magnitude interspecifically. Variation of HR transcends phylogeny and is influenced by numerous factors including temperature, activity, gas exchange, intracardiac shunts, pH, posture, and reflexogenic regulation of blood pressure. The characteristic resting HR is rarely the intrinsic rate of the pacemaker, which is primarily modulated by cholinergic… CONTINUE READING
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