Multiple resonances among time structures, chronomes, around and in US. Is an about 1.3-year periodicity in solar wind built into the human cardiovascular chronome?
OBJECTIVE
Velocity changes in the solar wind, recorded by satellite (IMP8 and Wind) are characterized by a solar cycle dependent approximately 1.3-year component. The presence of any approximately 1.3-year component in human blood pressure (BP) and heart rate (HR) and in mortality from myocardial infarction (MI) is tested and its relative prominence compared to the 1.0-year variation.


METHODS
Around the clock manual or automatic BP and HR measurements from four subjects recorded over 5 to 35 years and a 29-year record of mortality from MI in Minnesota were analyzed by linear-nonlinear rhythmometry. Point and 95% confidence interval (CI) estimates were obtained for the approximately 1.3-year period and amplitude. The latter is compared with the 1.0-year amplitude for BP and HR records concurrent to the solar data provided by one of us (JDR).


RESULTS
An approximately 1.3-year component is resolved nonlinearly for MI, with a period of 1.23 (95% CI: 1.21; 1.26) year. This component was invariably validated with statistical significance for BP and HR by linear rhythmometry. Nonlinearly, the 95% CI for the 1.3-year amplitude did not overlap zero in 11 of the 12 BP and HR series. Given the usually strong synchronizing role of light and temperature, it is surprising that 5 of the 12 cardiovascular series had a numerically larger amplitude of the 1.3-year versus the precise 1.0-year component. The beating of the approximately 1.3-year and 1.0-year components was shown by gliding spectra on actual and simulated data.


CONCLUSIONS
The shortest 5-year record (1998-2003) revealed an approximately 1.3-year component closer to the solar wind speed period characterizing the entire available record (1994-2003) than that for the concurrent 5-year span. Physiological variables may resonate with non-photic environmental cycles that may have entered the genetic code during evolution.
Cornélissen
G
G
Halberg Chronobiology Center, University of Minnesota, Minneapolis, MN, USA.
Masalov
A
A
Halberg
F
F
Richardson
J D
JD
Katinas
G S
GS
Sothern
R B
RB
Watanabe
Y
Y
Syutkina
E V
EV
Wendt
H W
HW
Bakken
E E
EE
Romanov
Y
Y
D000328:Adult; D000368:Aged; D001794:Blood Pressure / Q000502:physiology*; D002909:Chronobiology Phenomena; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008137:Longitudinal Studies; D008875:Middle Aged; D008910:Minnesota / Q000453:epidemiology; D009203:Myocardial Infarction / Q000401:mortality*; D017711:Nonlinear Dynamics; D010507:Periodicity; D019445:Solar Activity; D014919:Wind