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

被引：4

作者：

Keselbrener, L ^{[1
]}

Baharav, A ^{[1
]}

Ben-Dov, Y ^{[1
]}

Diamant, S ^{[1
]}

Berger, A ^{[1
]}

Sivan, Y ^{[1
]}

Akselrod, S ^{[1
]}

机构：

[1] Tel Aviv Univ, Sch Phys, Inst Med Phys, IL-69978 Tel Aviv, Israel

来源：

COMPUTERS IN CARDIOLOGY 1997, VOL 24 | 1997年 / 24卷

关键词：

D O I：

10.1109/CIC.1997.647870

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

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 sympathovagal balance is lower in tilted position among subjects with positive HUT as compared to negative HUT.

引用

页码：219 / 222

页数：4