these might include : ( i ) vascular obstruction in adjacent vascular systems that were not involved in the first occlusion , ( ii ) relative ischemia in the normal tissue surrounding the ischemic tissue due to an increased wall stress at the demarcation between contracting and noncontracting tissue , or ( 9 ) interruption of vessels supplying large interdigitations of normal tissue within the originally ischemic tissue due to changes associated with the process of infarction of ischemia .
C0021308
infarction
C0022116
ischemia