Baseline and maximal preexcitation
Both baseline and full preexcitation based ECG analysis were implemented
in WPW24.com to enhance its functionality. However, the baseline
preexcitation maps showed wider spread of regions than full
preeexcitation maps indicating lower value of fused QRS vectors for AP
localization. For formal comparison of baseline and full preexcitation
AP distribution maps three differentiating QRS polarities were chosen:
lead V1 negative/predominantly negative, lead I positive/predominantly
positive, lead III positive/predominantly positive. For each of these
polarities APs distribution were compared between baseline and full
preexcitation confirming differences in distribution (p <
0.05); for visual assessment see Supplementary Figure 3.