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. 2010 Nov 19;300(2):H605–H616. doi: 10.1152/ajpheart.00824.2010

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Fig. 1. — A: typical mouse heart, showing the 7 recording regions: 3 in the right ventricle (RV) and 4 in the left ventricle (LV). B: typical peak and trough bipolar electrogram (BEG) data obtained in the course of a programmed electrical stimulation (PES) procedure (bottom) and resulting conduction curve constructed using an experimental paced electrogram fractionation analysis (PEFA) procedure (top) (see methods for details). C: typical trace showing simultaneous recording from the RV outflow tract (RVOT) and LV outflow tract (LVOT) at the initiation of ventricular tachycardia (VT), showing earlier onset in the RVOT. Vertical markings denote timings of the pacing (S1) and the extra-systolic (S2) stimuli (arrowed). VERP, ventricular effective refractory period.