We record ECGs from healthy human subjects during 24-h long intervals, using ambulatory
equipment. We calculate from the data various parameters, searching for those that
change in a clear and systematic way under a homoepathic stimulus, (Strophantus hispidus 30 c). The energy fraction at high frequencies in the power spectrum of heart rate
variability fulfills this condition, and we are able to interpret our results in a
way consistent with the information on this medicine in the homeopathic Materia Medica.
Keywords
heart rate - power spectrum - ECG - healthy volunteers -
Strophanthus hispidus
- electrocardiogram - cross-correlation