Evolution of Action Potential Alternans in Rabbit Heart during Acute Regional Ischemia

Figure 4

Evolution of OAP alternans pattern during acute regional ischemia. CL = 200 ms. The time after the artery occlusion is shown on top of (a). (a) OAPA alternans maps. Color indicates the normalized value of alternans amplitude (). Interval between the isolines is 10%. (b) APD alternans maps. The numbers near isochrones show OAPD alternans in ms. The interval between isochrones is 5 ms. White area indicates OAPD alternans >80 ms. (c) Representative OAP recordings from the outside (top row A) and inside (bottom row B) of the ischemic region. The location of the recording sites a and b (white circles) are shown in (a). Other notations are as in Figure 2.

(a)

(b)

(c)