Human sinus arrhythmia: inconsistencies of a teleological hypothesis.

@article{Tzeng2009HumanSA,
  title={Human sinus arrhythmia: inconsistencies of a teleological hypothesis.},
  author={Y C Tzeng and Peter Y W Sin and Duncan C Galletly},
  journal={American journal of physiology. Heart and circulatory physiology},
  year={2009},
  volume={296 1},
  pages={H65-70}
}
Respiratory sinus arrhythmia (RSA) may serve an inherent function in optimizing pulmonary gas exchange efficiency via clustering and scattering of heart beats during the inspiratory and expiratory phases of the respiratory cycle. This study sought to determine whether physiological levels of RSA, enhanced by slow paced breathing, caused more heart beats to cluster in inspiration. In 12 human subjects, we analyzed the histogram distribution of heart beats throughout the respiratory cycle during… CONTINUE READING

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