TY - JOUR
T1 - Validation of a simple model for the morphology of the T wave in unipolar electrograms
AU - Potse, Mark
AU - Vinet, Alain
AU - Opthof, Tobias
AU - Coronel, Ruben
PY - 2009
Y1 - 2009
N2 - Potse M, Vinet A, Opthof T, Coronel R. Validation of a simple model for the morphology of the T wave in unipolar electrograms. Am J Physiol Heart Circ Physiol 297: H792-H801, 2009. First published May 22, 2009; doi: 10.1152/ajpheart.00064.2009.-Local unipolar electrograms (UEGs) permit assessment of local activation and repolarization times at multiple sites simultaneously. However, UEG-based indexes of local repolarization are still debated, in particular for positive T waves. Previous experimental and computer modeling studies have not been able to terminate the debate. In this study we validate a simple theoretical model of the UEG and use it to explain how repolarization statistics in the UEG relate to those in the action potential. The model reconstructs the UEG by taking the difference between an inverted local action potential and a position-independent remote signal. In normal tissue, this extremely simple model predicts T-wave morphology with surprising accuracy while explaining in a readily understandable way why the instant of repolarization is always related to the steepest upstroke of the UEG, both in positive and negative T waves, and why positive T waves are related to early repolarizing sites, whereas negative T waves are related to late repolarizing sites
AB - Potse M, Vinet A, Opthof T, Coronel R. Validation of a simple model for the morphology of the T wave in unipolar electrograms. Am J Physiol Heart Circ Physiol 297: H792-H801, 2009. First published May 22, 2009; doi: 10.1152/ajpheart.00064.2009.-Local unipolar electrograms (UEGs) permit assessment of local activation and repolarization times at multiple sites simultaneously. However, UEG-based indexes of local repolarization are still debated, in particular for positive T waves. Previous experimental and computer modeling studies have not been able to terminate the debate. In this study we validate a simple theoretical model of the UEG and use it to explain how repolarization statistics in the UEG relate to those in the action potential. The model reconstructs the UEG by taking the difference between an inverted local action potential and a position-independent remote signal. In normal tissue, this extremely simple model predicts T-wave morphology with surprising accuracy while explaining in a readily understandable way why the instant of repolarization is always related to the steepest upstroke of the UEG, both in positive and negative T waves, and why positive T waves are related to early repolarizing sites, whereas negative T waves are related to late repolarizing sites
U2 - https://doi.org/10.1152/ajpheart.00064.2009
DO - https://doi.org/10.1152/ajpheart.00064.2009
M3 - Article
C2 - 19465555
SN - 0363-6135
VL - 297
SP - H792-H801
JO - American journal of physiology. Heart and circulatory physiology
JF - American journal of physiology. Heart and circulatory physiology
IS - 2
ER -