Why the study?
Does geomagnetic activity correlate with baroreflex sensitivity in healthy rabbits?
Does geomagnetic activity correlate with baroreflex sensitivity in healthy rabbits?
Geomagnetic activity negatively correlates with baroreflex sensitivity in a rabbit model, offering a potential physiological explanation for cardiovascular events during solar storms.
Hypothesis-generating for geomagnetic effects on autonomic function in animals; leaves open relevance to human cardiovascular events during solar storms.
The objective of this work was to study the influence of geomagnetic activity as reflected by K-indices on the function of arterial baroreceptors. Forty-six experimental runs were carried out in 14 healthy adult male rabbits. Rabbits were sedated by pentobarbital infusion (5 mg/kg/h) and laid on their bellies in a metal drum with their heads fixed during the 50-min experiments. Baroreflex sensitivity (BRS) was estimated after a 15-min resting period by measuring changes in heart rate during nitroprusside-induced decreases and phenylephrine-induced increases in arterial blood pressure. We found a significant negative correlation (R = -0.44) of BRS with actual K-index values that demonstrated impaired sinocarotid baroreceptor functional state and may be one explanation for the increased occurrence of severe cardiovascular events during magnetic storms induced by intense solar activity.
No takes yet. Share an insight, caveat, or question.
Juraj Gmitrov (1999) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: