Dynamic analysis of heart rate variability from 7-day Holter recordings associated with geomagnetic activity in subarctic area

Author

Otsuka, K. ; Ichimaru, Y. ; Cornelissen, G. ; Weydahl, A. ; Holmeslet, B. ; Schwartzkopff, O. ; Halberg, F.

Author_Institution

Dept. of Med., Daini Hosp., Tokyo Women´´s Med. Univ., Japan

fYear

2000

fDate

2000

Firstpage

453

Lastpage

456

Abstract

Any influence of the natural variation in the geomagnetic field on human health has become an increasingly pertinent question in view of associations in space with myocardial infarction and stroke in Israel, Mexico, Minneapolis and Russia. HRV is examined on the basis of 7-day records by Holter ECG on 14 clinically healthy subjects (21-54 years) in Alta, Norway. Cross-spectra between geomagnetic activity and HRV measures were quantified via the squared coherence spectrum. Coherence was observed at the circadian frequency in VLF (coherence value: 0.6895), LF (0.6667) and HF (0.7065). Circadian coherence between geomagnetic disturbance and HRV endpoints would prompt the hypothesis that in polar regions human circadian periodicity is coordinated not only by photic factors, but also by non-photic circadian geomagnetic disturbance

Keywords

biocontrol; biological effects of fields; biomagnetism; electrocardiography; geomagnetism; medical signal processing; spectral analysis; 14 clinically healthy subjects; 21 to 54 y; 7 d; 7-day Holter recordings; Alta; HF; HRV; Holter ECG; Israel; LF; Mexico; Minneapolis; Norway; Russia; VLF; circadian frequency; cross-spectra; dynamic analysis; geomagnetic activity; geomagnetic field; heart rate variability; human circadian periodicity; human health; myocardial infarction; natural variation; nonphotic circadian geomagnetic disturbance; photic factors; polar regions; space; squared coherence spectrum; stroke; subarctic area; Educational institutions; Electrocardiography; Frequency; Geomagnetism; Hafnium; Heart rate variability; Humans; Observatories; Temperature; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Computers in Cardiology 2000

Conference_Location

Cambridge, MA

ISSN

0276-6547

Print_ISBN

0-7803-6557-7

Type

conf

DOI

10.1109/CIC.2000.898555

Filename

898555