PMID- 11513052
OWN - NLM
STAT- MEDLINE
DCOM- 20010920
LR  - 20191025
IS  - 0020-7128 (Print)
IS  - 0020-7128 (Linking)
VI  - 45
IP  - 2
DP  - 2001 Jul
TI  - Natural environmental associations in a 50-day human electrocardiogram.
PG  - 90-9
AB  - Meteorotropic associations of heart rate (HR) and HR variability (HRV) were 
      investigated in a clinically healthy 48-year-old man in Kiev. His 
      electrocardiogram (ECG) was determined over 50 days by fitting him with an 
      ambulatorily wearable device; various natural physical environmental variables 
      were also monitored. The mean inter-beat interval, the standard deviation of 
      these intervals, the spectral power in several frequency ranges, the power ratio 
      of the approx. 10.5-s/approx. 3.6-s spectral components and other aspects of HRV 
      were computed over consecutive 14.4-min intervals. Together with ordinary 
      meteorological variables, geomagnetic disturbances (GMD) and fluctuations of 
      atmospheric pressure (FAP) in the range 0.01-0.10 Hz (10-100 s) were measured. 
      The assessable infradian spectra (with frequencies lower than 1 cycle/28 hours) 
      of all HRV parameters showed two major components with periods of about 3.5 and 
      10 days. Two environmental variables, FAP and wind speed (with which FAP is 
      closely related), revealed both of these rhythms and showed the greatest 
      cross-spectral coherence (0.70-0.98) with corresponding oscillations of HRV. Less 
      specific but statistically significant product-moment correlations with major HRV 
      indices were also found; most of these were with FAP, but correlations with air 
      temperature, humidity, wind speed and geomagnetic disturbances were also found. 
      Long-term ECG recording, essential in the detection of infradian rhythms, proved 
      to be sensitive to physical environmental variables, notably meteorological ones. 
      FAP, usually neglected since its role has not been considered in previous 
      biometeorological studies, or some factor closely related to FAP is probably 
      involved in synchronizing or influencing the approximately 3.5-day HR and HRV 
      rhythms in humans.
FAU - Delyukov, A
AU  - Delyukov A
AD  - Biological Faculty, Taras Shevchenko University, Kiev, Ukraine.
FAU - Gorgo, Y
AU  - Gorgo Y
FAU - Cornelissen, G
AU  - Cornelissen G
FAU - Otsuka, K
AU  - Otsuka K
FAU - Halberg, F
AU  - Halberg F
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Int J Biometeorol
JT  - International journal of biometeorology
JID - 0374716
SB  - IM
MH  - Analysis of Variance
MH  - *Electrocardiography, Ambulatory
MH  - Heart Rate
MH  - Humans
MH  - Male
MH  - Meteorological Concepts
MH  - Middle Aged
MH  - Time Factors
MH  - Ukraine
EDAT- 2001/08/22 10:00
MHDA- 2001/09/21 10:01
CRDT- 2001/08/22 10:00
PHST- 2001/08/22 10:00 [pubmed]
PHST- 2001/09/21 10:01 [medline]
PHST- 2001/08/22 10:00 [entrez]
AID - 10.1007/s004840100086 [doi]
PST - ppublish
SO  - Int J Biometeorol. 2001 Jul;45(2):90-9. doi: 10.1007/s004840100086.