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. 2023 Jan 31;4(2):60–67. doi: 10.1016/j.cvdhj.2023.01.004

Figure 4.

Figure 4

Saliency maps of each electrocardiogram (ECG) class. Saliency maps showing the most prominent sections of ECG recordings in influencing the output of the neural network for the ECG classes of A: atrioventricular nodal re-entrant tachycardia (AVNRT) and B: atrioventricular re-entrant tachycardia (AVRT). Darker red indicates higher saliency. The QRS in each case appears to be salient; this may relate to the presence and timing of retrograde P waves in the QRS complex and is biologically plausible.