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Dependence of Atrial Fibrillatory Rate Variations Induced by Head-Up/Down Tilt-Test on Autonomic Action

文献类型： 会议论文

第一作者： Chiara Celotto

作者： Chiara Celotto 1 ; Carlos Sánchez 1 ; Mostafa Abdollahpur 2 ; Frida Sandberg 2 ; Pablo Laguna 1 ; Esther Pueyo 1 ;

作者机构： 1.Aragon Institute of Engineering Research, University of Zaragoza, IIS Aragón, Zaragoza, Spain|CIBER in Bioengineering, Biomaterials and Nanomedicine, Zaragoza, Spain

2.University of Lund, Lund, Sweden

关键词： Protocols;Frequency modulation;Force;Autonomic nervous system;Rotors;Resonant frequency;Atrial fibrillation

会议名称： Computing in Cardiology Conference

主办单位：

页码： 1-4

摘要： In atrial fibrillation (AF), autonomic nervous system (ANS) differences among individuals may have a substantial influence on the varying effectiveness of anti-AF treatments. This work aimed to assess the relationship between changes in autonomic balance and in atrial fibrillatory rate (AFR) oscillations $(F_{mathrm{f}}(t))$ induced by head-up (HUT) and head-down (HDT) tilt test. 22 persistent AF (psAF) patients underwent a tilt test protocol and ECGs were recorded and analyzed to extract $F_{mathrm{f}}(t)$ and its respiratory modulation $(Delta F_{mathrm{f}})$. Electrophysiological simulations of stable reentrant rotors in 2D human atrial psAF tissues were performed. Combinations of different levels of parasympathetic stimulation (PSS) by acetylcholine (ACh) and sympathetic stimulation (SS) by isoproterenol (Iso) were tested. The respiratory-related modulation of ACh was modeled by a cyclic temporal variation of ACh. In the patients, HUT/HDT resulted in an increase/decrease in AFR with respect to baseline (BL). Variations in $Delta F_{mathrm{f}}$ from HDT/HUT to BL/HDT were significantly positively correlated with the variations in mean $F_{mathrm{f}}(t)(overline{F}_{mathrm{f}})$. In the simulations, higher Iso and/or ACh led to an increase in $overline{F}_{mathrm{f}}$, while $Delta F_{mathrm{f}}$ was correlated to the range of ACh variation. HUT/HDT increased/decreased AFR, which could be explained by an increase/reduction in SS. The concomitant variation in $Delta F_{mathrm{f}}$ could be linked to changes in PSS.

分类号： tp3

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