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. Author manuscript; available in PMC: 2021 Jul 1.
Published in final edited form as: J Electrocardiol. 2020 Jun 5;61:81–85. doi: 10.1016/j.jelectrocard.2020.06.003

Figure 2: Spatial View of the Most Important 12-Lead ECG Features for EF Prediction.

Figure 2:

(A) The spatial view of the 12 surface leads in relation to myocardial walls. Leads I–III and aVR–aVF constitute the frontal plane and leads V1–V6 constitute the horizontal plane. (B) The computation of initial horizontal QRS axis and ventricular activation time (VAT) from two selected patients: a 33-year-old female diagnosed with pericarditis (Patient 1) and a 49-year-old male diagnosed with acute myocardial infarction (Patient 2). Note the dominant QS pattern in V3, compared to a biphasic QRS, in the second patient.