Experimentally-Based Computational Investigation into Beat-To-Beat Variability in Ventricular Repolarization and Its Response to Ionic Current InhibitionCitation formats

  • External authors:
  • E Pueyo
  • C E Dangerfield
  • O J Britton
  • L Virág
  • Norbert Szentandrassy
  • N Jost
  • A Varró
  • P P Nánási
  • K Burrage
  • B Rodríguez

Standard

Experimentally-Based Computational Investigation into Beat-To-Beat Variability in Ventricular Repolarization and Its Response to Ionic Current Inhibition. / Pueyo, E; Dangerfield, C E; Britton, O J; Virág, L; Kistamás, K; Szentandrassy, Norbert; Jost, N; Varró, A; Nánási, P P; Burrage, K; Rodríguez, B.

In: PLoS ONE, Vol. 11, No. 3, 28.03.2016, p. e0151461.

Research output: Contribution to journalArticle

Harvard

Pueyo, E, Dangerfield, CE, Britton, OJ, Virág, L, Kistamás, K, Szentandrassy, N, Jost, N, Varró, A, Nánási, PP, Burrage, K & Rodríguez, B 2016, 'Experimentally-Based Computational Investigation into Beat-To-Beat Variability in Ventricular Repolarization and Its Response to Ionic Current Inhibition' PLoS ONE, vol 11, no. 3, pp. e0151461. DOI: 10.1371/journal.pone.0151461

APA

Pueyo, E., Dangerfield, C. E., Britton, O. J., Virág, L., Kistamás, K., Szentandrassy, N., ... Rodríguez, B. (2016). Experimentally-Based Computational Investigation into Beat-To-Beat Variability in Ventricular Repolarization and Its Response to Ionic Current Inhibition. PLoS ONE, 11(3), e0151461. DOI: 10.1371/journal.pone.0151461

Vancouver

Pueyo E, Dangerfield CE, Britton OJ, Virág L, Kistamás K, Szentandrassy N et al. Experimentally-Based Computational Investigation into Beat-To-Beat Variability in Ventricular Repolarization and Its Response to Ionic Current Inhibition. PLoS ONE. 2016 Mar 28;11(3):e0151461. Available from, DOI: 10.1371/journal.pone.0151461

Author

Pueyo, E; Dangerfield, C E; Britton, O J; Virág, L; Kistamás, K; Szentandrassy, Norbert; Jost, N; Varró, A; Nánási, P P; Burrage, K; Rodríguez, B / Experimentally-Based Computational Investigation into Beat-To-Beat Variability in Ventricular Repolarization and Its Response to Ionic Current Inhibition.

In: PLoS ONE, Vol. 11, No. 3, 28.03.2016, p. e0151461.

Research output: Contribution to journalArticle

Bibtex

@article{e1bc7637745842ab81de489af121dcf8,
title = "Experimentally-Based Computational Investigation into Beat-To-Beat Variability in Ventricular Repolarization and Its Response to Ionic Current Inhibition",
abstract = "Beat-to-beat variability in repolarization (BVR) has been proposed as an arrhythmic risk marker for disease and pharmacological action. The mechanisms are unclear but BVR is thought to be a cell level manifestation of ion channel stochasticity, modulated by cell-to-cell differences in ionic conductances. In this study, we describe the construction of an experimentally-calibrated set of stochastic cardiac cell models that captures both BVR and cell-to-cell differences in BVR displayed in isolated canine action potential measurements using pharmacological agents. Simulated and experimental ranges of BVR are compared in control and under pharmacological inhibition, and the key ionic currents determining BVR under physiological and pharmacological conditions are identified. Results show that the 4-aminopyridine-sensitive transient outward potassium current, Ito1, is a fundamental driver of BVR in control and upon complete inhibition of the slow delayed rectifier potassium current, IKs. In contrast, IKs and the L-type calcium current, ICaL, become the major contributors to BVR upon inhibition of the fast delayed rectifier potassium current, IKr. This highlights both IKs and Ito1 as key contributors to repolarization reserve. Partial correlation analysis identifies the distribution of Ito1 channel numbers as an important independent determinant of the magnitude of BVR and drug-induced change in BVR in control and under pharmacological inhibition of ionic currents. Distributions in the number of IKs and ICaL channels only become independent determinants of the magnitude of BVR upon complete inhibition of IKr. These findings provide quantitative insights into the ionic causes of BVR as a marker for repolarization reserve, both under control condition and pharmacological inhibition.",
author = "E Pueyo and Dangerfield, {C E} and Britton, {O J} and L Virág and K Kistamás and Norbert Szentandrassy and N Jost and A Varró and Nánási, {P P} and K Burrage and B Rodríguez",
year = "2016",
month = "3",
doi = "10.1371/journal.pone.0151461",
volume = "11",
pages = "e0151461",
journal = "P L o S One",
issn = "1932-6203",
publisher = "Public Library of Science",
number = "3",

}

RIS

TY - JOUR

T1 - Experimentally-Based Computational Investigation into Beat-To-Beat Variability in Ventricular Repolarization and Its Response to Ionic Current Inhibition

AU - Pueyo,E

AU - Dangerfield,C E

AU - Britton,O J

AU - Virág,L

AU - Kistamás,K

AU - Szentandrassy,Norbert

AU - Jost,N

AU - Varró,A

AU - Nánási,P P

AU - Burrage,K

AU - Rodríguez,B

PY - 2016/3/28

Y1 - 2016/3/28

N2 - Beat-to-beat variability in repolarization (BVR) has been proposed as an arrhythmic risk marker for disease and pharmacological action. The mechanisms are unclear but BVR is thought to be a cell level manifestation of ion channel stochasticity, modulated by cell-to-cell differences in ionic conductances. In this study, we describe the construction of an experimentally-calibrated set of stochastic cardiac cell models that captures both BVR and cell-to-cell differences in BVR displayed in isolated canine action potential measurements using pharmacological agents. Simulated and experimental ranges of BVR are compared in control and under pharmacological inhibition, and the key ionic currents determining BVR under physiological and pharmacological conditions are identified. Results show that the 4-aminopyridine-sensitive transient outward potassium current, Ito1, is a fundamental driver of BVR in control and upon complete inhibition of the slow delayed rectifier potassium current, IKs. In contrast, IKs and the L-type calcium current, ICaL, become the major contributors to BVR upon inhibition of the fast delayed rectifier potassium current, IKr. This highlights both IKs and Ito1 as key contributors to repolarization reserve. Partial correlation analysis identifies the distribution of Ito1 channel numbers as an important independent determinant of the magnitude of BVR and drug-induced change in BVR in control and under pharmacological inhibition of ionic currents. Distributions in the number of IKs and ICaL channels only become independent determinants of the magnitude of BVR upon complete inhibition of IKr. These findings provide quantitative insights into the ionic causes of BVR as a marker for repolarization reserve, both under control condition and pharmacological inhibition.

AB - Beat-to-beat variability in repolarization (BVR) has been proposed as an arrhythmic risk marker for disease and pharmacological action. The mechanisms are unclear but BVR is thought to be a cell level manifestation of ion channel stochasticity, modulated by cell-to-cell differences in ionic conductances. In this study, we describe the construction of an experimentally-calibrated set of stochastic cardiac cell models that captures both BVR and cell-to-cell differences in BVR displayed in isolated canine action potential measurements using pharmacological agents. Simulated and experimental ranges of BVR are compared in control and under pharmacological inhibition, and the key ionic currents determining BVR under physiological and pharmacological conditions are identified. Results show that the 4-aminopyridine-sensitive transient outward potassium current, Ito1, is a fundamental driver of BVR in control and upon complete inhibition of the slow delayed rectifier potassium current, IKs. In contrast, IKs and the L-type calcium current, ICaL, become the major contributors to BVR upon inhibition of the fast delayed rectifier potassium current, IKr. This highlights both IKs and Ito1 as key contributors to repolarization reserve. Partial correlation analysis identifies the distribution of Ito1 channel numbers as an important independent determinant of the magnitude of BVR and drug-induced change in BVR in control and under pharmacological inhibition of ionic currents. Distributions in the number of IKs and ICaL channels only become independent determinants of the magnitude of BVR upon complete inhibition of IKr. These findings provide quantitative insights into the ionic causes of BVR as a marker for repolarization reserve, both under control condition and pharmacological inhibition.

U2 - 10.1371/journal.pone.0151461

DO - 10.1371/journal.pone.0151461

M3 - Article

VL - 11

SP - e0151461

JO - P L o S One

T2 - P L o S One

JF - P L o S One

SN - 1932-6203

IS - 3

ER -