Influence of Circadian Rhythm on the Electrophysiological Properties of the Human Heart

  • J. Cinca
  • A. Moya
  • A. Bardaji
  • J. Figueras
Part of the Developments in Cardiovascular Medicine book series (DICM, volume 81)


Experimental studies in dogs [1–4] have demonstrated that electrical stimulation of the sympathetic fibers of the heart accelerates intranodal conduction, shortens refractory periods and depresses the threshold for ventricular fibrillation. Stimulation of the parasympathetic fibers has the opposite effect. In the human being, few studies of this type are available. In a small series of patients, lengthening of intranodal conduction after electrical stimulation of the carotid sinus has been demonstrated [5]. In another series of patients, we observed variations in the electrical properties of the heart after anesthesia of the stellate ganglion [6].


Right Ventricle Refractory Period Carotid Sinus Sinus Rate Stellate Ganglion 
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Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • J. Cinca
  • A. Moya
  • A. Bardaji
  • J. Figueras

There are no affiliations available

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