Ischemia
The word "ischemia" () is from Greek ἴσχαιμος "iskhaimos", "staunching blood" from ἴσχω "iskhο", "keep back, restrain" and αἷμα "haima", "blood".
Ischemic colitis
Ischemic colitis is often classified according to the underlying cause. "Non-occlusive" ischemia develops because of low blood pressure or constriction of the vessels feeding the colon; "occlusive" ischemia indicates that a blood clot or other blockage has cut off blood flow to the colon.