Time-frequency decomposition of HR and BP variability in reflex syncope

L. Keselbrener; A. Baharav; Y. Ben-Dov; S. Diamant; A. Berger; Y. Sivan; S. Akselrod

Time-frequency decomposition of HR and BP variability in reflex syncope

L. Keselbrener, A. Baharav, Y. Ben-Dov, S. Diamant, A. Berger, Y. Sivan, S. Akselrod

Research output: Contribution to journal › Conference article › peer-review

4 Scopus citations

Abstract

The autonomic control plays an essential role in the pathogenesis of reflex syncope. Still, the precise etiology of syncope is not completely understood and the clinical diagnosis of its origin remains rough and empirical. Head Up Tilt (HUT) test is used to reproduce symptoms. We have applied time frequency decomposition of HRV and BPV, which allows to evaluate the exact time evolution of the autonomic activity even during the transient stages of the HUT and syncope. We have observed, in typical vasovagal syncope, the sympathetic withdrawal, and the subsequent vagal surge. We have also been able to show that no vagal surge occurs at the instant of vasodepressor syncope. We have observed that the vagal activity is enhanced and the sympatho-vagal balance is lower in tilted position among subjects with positive HUT as compared to negative HUT.

Original language	English
Pages (from-to)	219-222
Number of pages	4
Journal	Computers in Cardiology
State	Published - 1997
Externally published	Yes
Event	Proceedings of the 1997 24th Annual Meeting on Computers in Cardiology - Lund, Sweden Duration: 7 Sep 1997 → 10 Sep 1997

Cite this

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title = "Time-frequency decomposition of HR and BP variability in reflex syncope",

abstract = "The autonomic control plays an essential role in the pathogenesis of reflex syncope. Still, the precise etiology of syncope is not completely understood and the clinical diagnosis of its origin remains rough and empirical. Head Up Tilt (HUT) test is used to reproduce symptoms. We have applied time frequency decomposition of HRV and BPV, which allows to evaluate the exact time evolution of the autonomic activity even during the transient stages of the HUT and syncope. We have observed, in typical vasovagal syncope, the sympathetic withdrawal, and the subsequent vagal surge. We have also been able to show that no vagal surge occurs at the instant of vasodepressor syncope. We have observed that the vagal activity is enhanced and the sympatho-vagal balance is lower in tilted position among subjects with positive HUT as compared to negative HUT.",

author = "L. Keselbrener and A. Baharav and Y. Ben-Dov and S. Diamant and A. Berger and Y. Sivan and S. Akselrod",

year = "1997",

language = "אנגלית",

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journal = "Computers in Cardiology",

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note = "Proceedings of the 1997 24th Annual Meeting on Computers in Cardiology ; Conference date: 07-09-1997 Through 10-09-1997",

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TY - JOUR

T1 - Time-frequency decomposition of HR and BP variability in reflex syncope

AU - Keselbrener, L.

AU - Baharav, A.

AU - Ben-Dov, Y.

AU - Diamant, S.

AU - Berger, A.

AU - Sivan, Y.

AU - Akselrod, S.

PY - 1997

Y1 - 1997

N2 - The autonomic control plays an essential role in the pathogenesis of reflex syncope. Still, the precise etiology of syncope is not completely understood and the clinical diagnosis of its origin remains rough and empirical. Head Up Tilt (HUT) test is used to reproduce symptoms. We have applied time frequency decomposition of HRV and BPV, which allows to evaluate the exact time evolution of the autonomic activity even during the transient stages of the HUT and syncope. We have observed, in typical vasovagal syncope, the sympathetic withdrawal, and the subsequent vagal surge. We have also been able to show that no vagal surge occurs at the instant of vasodepressor syncope. We have observed that the vagal activity is enhanced and the sympatho-vagal balance is lower in tilted position among subjects with positive HUT as compared to negative HUT.

AB - The autonomic control plays an essential role in the pathogenesis of reflex syncope. Still, the precise etiology of syncope is not completely understood and the clinical diagnosis of its origin remains rough and empirical. Head Up Tilt (HUT) test is used to reproduce symptoms. We have applied time frequency decomposition of HRV and BPV, which allows to evaluate the exact time evolution of the autonomic activity even during the transient stages of the HUT and syncope. We have observed, in typical vasovagal syncope, the sympathetic withdrawal, and the subsequent vagal surge. We have also been able to show that no vagal surge occurs at the instant of vasodepressor syncope. We have observed that the vagal activity is enhanced and the sympatho-vagal balance is lower in tilted position among subjects with positive HUT as compared to negative HUT.

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JF - Computers in Cardiology

T2 - Proceedings of the 1997 24th Annual Meeting on Computers in Cardiology

Y2 - 7 September 1997 through 10 September 1997

ER -

Time-frequency decomposition of HR and BP variability in reflex syncope

Abstract

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