广义的分水岭梗死(watershedinfarction,WI)又称边界区梗死(border zonein farction),是指在脑、心、肾器官内,相邻的较大的2条或2条以上动脉由于动脉管腔狭窄、闭塞等多种原因引起其灌流压同时降低。使灌流交界区(arterial border zone)发生严重局限性缺血而导致梗死。心、脑、肾等器官可发生WI,但以脑最易出现,称脑分水岭梗死(cerebral watershedinfarction,CWI),是指脑内相邻的较大血管供血区之间即边缘带(border zo ......