Asset Details
Do you wish to reserve the book?
Changes in EEG and ECG signal connectivity during tilt table testing in healthy young adults without syncope
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Changes in EEG and ECG signal connectivity during tilt table testing in healthy young adults without syncope
Do you wish to request the book?
Changes in EEG and ECG signal connectivity during tilt table testing in healthy young adults without syncope
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Changes in EEG and ECG signal connectivity during tilt table testing in healthy young adults without syncope
2025
Overview
Introduction
Tilt table testing (TTT) has been used for over fifty years in clinical and basic medicine to study the adaptation of heart rate and blood pressure to changes in body position. In the area of studying local features of electroencephalogram (EEG) and electrocardiogram (ECG) signal synchronization, there is a lack of research devoted to the precise quantitative mathematical analysis of electrophysiological signals recorded during TTT. Furthermore, most studies related to brain activity analysis focus on the development of syncope.
Methods
This study analyzed electrophysiological signals (EEG and ECG) in 19 healthy men. The TTT procedure was performed in a gentle mode with a slight elevation (45°) of the volunteers after 15 min of horizontal positioning. This procedure eliminated the risk of syncope. Time-frequency analysis of the EEG was performed using a continuous wavelet transform. Synchronization of electrophysiological signals in the brain and cardiac activity was assessed using wavelet bicoherence, assessed pairwise between ECG and EEG signals.
Results
EEG activity in the brain remained unchanged before and after verticalization of the volunteers. Heart rate increased, on average, from 1.0 to 1.05 Hz in the horizontal position to 1.3–1.4 Hz in the vertical position (
p
< 0.005). Significant changes in synchronization were demonstrated before and after verticalization of the volunteers. Most interesting is the increase in ECG and EEG synchronization in the low-frequency range [0.25; 0.75] Hz in response to the tilt table test. Such changes in synchronization can be interpreted in the context of the activation of the human body’s adaptive responses during this test.
Conclusion
This study results provide a basis for understanding the physiological relationship between the cardiovascular system and brain activity during the standing position test (SPT) without syncope. These results suggest that low-frequency (below the baseline heart rate) components of P-QRS-T complex variability may be a promising approach for studying neurocardiac interactions.
Publisher
BioMed Central,BioMed Central Ltd,BMC
Subject
