scholarly journals CrossTalk proposal: Bradycardia in the trained athlete is attributable to high vagal tone

2015 ◽  
Vol 593 (8) ◽  
pp. 1745-1747 ◽  
Author(s):  
John H. Coote ◽  
Michael J. White
Keyword(s):  
Vagal Tone ◽  
Trained Athlete

Vagal tone mediates the association between work stress and glycemic status: results from the Mannheim Industrial Cohort Study (MICS)

2013 ◽  
Vol 75 (08/09) ◽  
Author(s):  
MN Jarczok ◽  
J Li ◽  
K Hoffmann ◽  
D Mauss ◽  
JE Fischer ◽  
...  
Keyword(s):  
Cohort Study ◽  
Work Stress ◽  
Vagal Tone ◽  
Glycemic Status

scholarly journals Direct measurement of vagal tone in rats does not show correlation to HRV

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Joseph T. Marmerstein ◽  
Grant A. McCallum ◽  
Dominique M. Durand
Keyword(s):  
Heart Failure ◽  
Heart Rate ◽  
Heart Rate Variability ◽  
Neural Activity ◽  
Vagal Tone ◽  
Neural Recording ◽  
The Body ◽  
Autonomic Nerve ◽  
Vagal Activity ◽  
Recording Technology

AbstractThe vagus nerve is the largest autonomic nerve, innervating nearly every organ in the body. “Vagal tone” is a clinical measure believed to indicate overall levels of vagal activity, but is measured indirectly through the heart rate variability (HRV). Abnormal HRV has been associated with many severe conditions such as diabetes, heart failure, and hypertension. However, vagal tone has never been directly measured, leading to disagreements in its interpretation and influencing the effectiveness of vagal therapies. Using custom carbon nanotube yarn electrodes, we were able to chronically record neural activity from the left cervical vagus in both anesthetized and non-anesthetized rats. Here we show that tonic vagal activity does not correlate with common HRV metrics with or without anesthesia. Although we found that average vagal activity is increased during inspiration compared to expiration, this respiratory-linked signal was not correlated with HRV either. These results represent a clear advance in neural recording technology but also point to the need for a re-interpretation of the link between HRV and “vagal tone”.

Central α1-adrenergic and opiate systems in the control of the vagal tone in normotensive and spontaneously hypertensive rats

1986 ◽  
Vol 17 (3) ◽  
pp. 175-183 ◽  
Author(s):  
Anne-Marie Huchet ◽  
François Huguet ◽  
Bruno Gautret ◽  
Catherine Gitton ◽  
Guy Narcisse ◽  
...  
Keyword(s):  
Spontaneously Hypertensive Rats ◽  
Vagal Tone ◽  
Hypertensive Rats ◽  
Spontaneously Hypertensive
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