Skip to main content
. Author manuscript; available in PMC: 2011 Nov 1.
Published in final edited form as: J Cardiovasc Electrophysiol. 2010 Nov;21(11):1266–1273. doi: 10.1111/j.1540-8167.2010.01803.x

Figure 2.

Figure 2

Recordings and activation times for 15 cycles soon after the onset of VF (A) and after 5 min of VF (B). The 64 unipolar basket recordings are shown in the top of each panel with an RV unipolar recording and ECG lead II below them. Below the ECG are the V activation times for the 64 basket electrodes during the same time period with each short vertical line representing an activation. At the bottom of each panel the activations for all 64 electrodes are shown on a single line. The 15 cycles are numbered at the top of panel B. In A, endocardial activations are present throughout the cardiac cycles consistent with reentry. In B, however, activation is highly synchronized with activation present during only a small part of the cardiac cycle, so that 14 large temporal gaps are present between the 15 cycles of activation in which no activations are present. This finding is inconsistent with reentry near the LV endocardium. In both panels, RV activation and ECG lead II appear disorganized as expected for VF.