Skin sympathetic nerve activity and ventricular rate control during atrial fibrillation

Takashi Kusayama, Anthony Douglas, Juyi Wan, Anisiia Doytchinova, Johnson Wong, Gloria Mitscher, Susan Straka, Changyu Shen, Thomas H. Everett, Peng Sheng Chen

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Background: The relationship between the ventricular rate (VR) during atrial fibrillation (AF) and skin sympathetic nerve activity (SKNA) remains unclear. Objective: The purpose of this study was to test the hypothesis that SKNA bursts accelerate VR during AF. Methods: We simultaneously recorded electrocardiogram and SKNA in 8 patients (median age 66.0 years [interquartile range {IQR} 59.0–77.0 years]; 4 men [50%]) with 30 paroxysmal AF episodes (all >10-minute long) and 12 patients (73.0 years [IQR 60.5–80.0 years]; 6 men [50%]) with persistent AF. The average amplitude of SKNA (aSKNA [μV]) during AF was analyzed in 1-minute windows and binned, showing 2 Gaussian distributions. We used the mean + 3SD of the first Gaussian distribution as the threshold that separates burst from baseline (nonburst) SKNA. All 1-minute aSKNA values above the threshold were detected, and the area between aSKNA and baseline of every 1 minute was calculated and added as burst area. Results: VR was higher during SKNA bursts than during the nonburst period (103 beats/min [IQR 83–113 beats/min] vs 88 beats/min [IQR 76–101 beats/min], respectively; P = .003). In the highest quartile of the burst area during persistent AF, the scatterplot of maximal aSKNA and VR during each SKNA burst shows higher aSKNA and VR. The overall estimate of the correlation between maximal VR and aSKNA during bursts show a positive correlation in the highest quartile of the burst area (0.64; 95% confidence interval 0.54–0.74; P < .0001). Conclusion: SKNA bursts are associated with VR acceleration. These SKNA bursts may be new therapeutic targets for rate control during AF.

Original languageEnglish (US)
Pages (from-to)544-552
Number of pages9
JournalHeart Rhythm
Volume17
Issue number4
DOIs
StatePublished - Apr 2020

Keywords

  • Atrial fibrillation
  • Rate control
  • Skin sympathetic nerve activity
  • Sympathetic nerve

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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    Kusayama, T., Douglas, A., Wan, J., Doytchinova, A., Wong, J., Mitscher, G., Straka, S., Shen, C., Everett, T. H., & Chen, P. S. (2020). Skin sympathetic nerve activity and ventricular rate control during atrial fibrillation. Heart Rhythm, 17(4), 544-552. https://doi.org/10.1016/j.hrthm.2019.11.017