The effect of reduced intercellular coupling on electrocardiographic signs of left ventricular hypertrophy

Ljuba Bacharova*, Anton Mateasik, Rolf Krause, Frits W. Prinzen, Angelo Auricchio, Mark Potse

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

30 Citations (Web of Science)

Abstract

Background: The electrocardiographic (ECG) diagnosis of left ventricular hypertrophy (LVH) is based on the assumption that QRS voltage increases with left ventricular mass. However, most of patients with echocardiographically detected LVH do not have increased QRS voltage. Reduced intercellular coupling has been observed in LVH patients and animal models. The purpose of this study was to show that this uncoupling can explain relatively low QRS voltage in LVH patients. Methods: Electrocardiograms and vectorcardiograms (VCG) were simulated with a realistic large-scale computer model of the human heart and torso that reliably represented the effects of reduced coupling on both propagation and ECG voltage. Results: Uncoupling reduced QRS voltage in all leads except aVL, reflecting a decrease in vector amplitude as well as a leftward axis deviation that suggested left anterior fascicular block. Conclusions: Low QRS voltage does not necessarily contradict a diagnosis of LVH but may be an indication for electrical uncoupling. The diagnostic value of this "relative voltage deficit" needs to be demonstrated in clinical studies.
Original languageEnglish
Pages (from-to)571-576
JournalJournal of Electrocardiology
Volume44
Issue number5
DOIs
Publication statusPublished - 2011

Keywords

  • Intercellular coupling
  • Electrocardiogram and vectorcardiogram
  • QRS complex
  • Computer model

Cite this