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In Vivo Human Left-to-Right Ventricular Differences in Rate Adaptation Transiently Increase Pro-Arrhythmic Risk following Rate Acceleration

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  • Alfonso Bueno-Orovio
  • Ben M Hanson
  • Jaswinder S Gill
  • Peter Taggart
  • Blanca Rodriguez

Abstract

Left-to-right ventricular (LV/RV) differences in repolarization have been implicated in lethal arrhythmias in animal models. Our goal is to quantify LV/RV differences in action potential duration (APD) and APD rate adaptation and their contribution to arrhythmogenic substrates in the in vivo human heart using combined in vivo and in silico studies. Electrograms were acquired from 10 LV and 10 RV endocardial sites in 15 patients with normal ventricles. APD and APD adaptation were measured during an increase in heart rate. Analysis of in vivo electrograms revealed longer APD in LV than RV (207.8±21.5 vs 196.7±20.1 ms; P

Suggested Citation

  • Alfonso Bueno-Orovio & Ben M Hanson & Jaswinder S Gill & Peter Taggart & Blanca Rodriguez, 2012. "In Vivo Human Left-to-Right Ventricular Differences in Rate Adaptation Transiently Increase Pro-Arrhythmic Risk following Rate Acceleration," PLOS ONE, Public Library of Science, vol. 7(12), pages 1-12, December.
    • Handle: RePEc:plo:pone00:0052234
    DOI: 10.1371/journal.pone.0052234
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