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. 2017 Aug 4;17:216. doi: 10.1186/s12872-017-0652-9

Fig. 3.

Fig. 3

Averaged QRS complexes recorded in hearts with low (L) and high (H) LV mass fraction in the range from −90° to +90° (top). Top views of the heart illustrate the position of bipolar lead during electrogram recording (bottom). LV – left ventricle