CrossTalk proposal: Bradycardia in the trained athlete is attributable to high vagal tone
نویسندگان
چکیده
منابع مشابه
CrossTalk opposing view: Bradycardia in the trained athlete is attributable to a downregulation of a pacemaker channel in the sinus node
It should not be ignored that our interpreting the HF power in the heart frequency spectrum as indicating an increase in cardiac parasympathetic activity was only one part of our argument. There are three points we now wish to further emphasise. One is that blocking the If pacemaker current and slowing heart rate does not change the power of the HF component in humans as we previously cited and...
متن کاملViewpoint: is the resting bradycardia in athletes the result of remodeling of the sinoatrial node rather than high vagal tone?
IT IS WELL KNOWN THAT ATHLETES have a low resting heart rate, i.e., a resting bradycardia and heart rates below 30 beats/min have been reported (7). For example, Wikipedia states that the Tour de France cyclist, Miguel Indurain, had a resting heart rate of 28 beats/min when race fit. The resting bradycardia in athletes is most often attributed to high vagal tone, i.e., high parasympathetic nerv...
متن کاملVagal third-degree atrioventricular block in a highly trained endurance athlete.
The electrocardiogram (ECG) characteristics of athletes have recently become a topic of intensive study to accurately identify dangerous and benign alterations in this special population. These subjects develop a high-vagal tone and consequently sinus bradycardia and different degrees of atrioventricular (AV)-block, but it is difficult to determine how much is too much, and the indications for ...
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The neurovisceral integration model (Thayer & Lane, 2000) proposes that vagally mediated heart rate variability (HRV)—an index of cardiac vagal tone—is associated with autonomic flexibility and emotional self-regulation. Two experiments examined the relationship between vagally mediated HRV and visual perception of affectively significant stimuli at different spatial frequency. In Experiment 1,...
متن کاملWhither vagal tone.
Measures of respiratory sinus arrhythmia (RSA) have been widely applied in the physiological and psychophysiological literature as an index of vagal control of the heart. Despite an extensive literature, however, differences in interpretation remain within the field. A guiding conception for several contributions in this issue is the notion of separate brainstem centers involved in parasympathe...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 2015
ISSN: 0022-3751
DOI: 10.1113/jphysiol.2014.284364