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. Author manuscript; available in PMC: 2018 Mar 1.
Published in final edited form as: Circ Arrhythm Electrophysiol. 2017 Mar;10(3):e004667. doi: 10.1161/CIRCEP.116.004667

Figure 8.

Figure 8

Initiation of reentry during acute ischemia. A. Injury current across the border zone (BZ) excites adjacent repolarized tissue in the non-ischemic zone (NIZ) to trigger a PVC (|) which propagates through the NIZ and reenters the ischemic zone (IZ) to initiate reentry. B. In ischemic subepicardial tissue, regions of all-or-none early repolarization with very short APD (blue) are juxtaposed to adjacent regions with normal APD and accentuated AP domes (red). The AP dome propagates into the repolarized region to trigger a closely coupled PVC (|) that propagates laterally until the normal AP region repolarizes and then reenters this region to initiate phase 2 reentry.