False Alarm Reduction in Self-Care by Personalized Automatic Detection of ECG Electrode Cable Interchanges

Figure 3

Sample CAVIAR displays of serial QRS (a) and T wave (b) changes for the tested electrode cable reversals with reference to the standard ECGs of patients (a) and (b) presented in Figure 4. The first display at the top left of panels (a) and (b) shows the CAVIAR optimal superimposition results between the standard ECGs and the corresponding, electrode cable reversals free, original 3D ECGs recorded with the PEM device at respectively 5 min (patient (a)) and 1 h interval (patient (b)). The three other displays of panel (a) highlight the effect on the QRS wave of a simulated, pairwise LA, RA, and LL electrode cables reversal on the PEM ECGs of patient (a), and in panel (b) the effect on the T wave of a reversal between each of the limb electrodes and C2 for patient (b). The beginning and the end of the QRS wave (resp. of the T wave) are respectively colored in black and red (resp. in red and grey) for the standard reference ECG and in blue and orange (resp. in orange and dark red) for the PEM ECG.

(a)

(b)