图示破裂已达肌层。主动脉破裂是最严重且最紧急的，病人可能在极短的时间内死亡。血液可沿主动脉向上或向下剥离动脉。血液沿大血管附近向上剥离，可封闭颈总动脉；血液向下剥离，可封闭冠状动脉。
Here, the dissection went into the muscular wall. In any case, an aortic dissection is an extreme emergency and can lead to death in a matter of minutes. The blood can dissect up or down the aorta. Blood dissecting up around the great vessels can close off the carotids. Blood can dissect down to the coronaries and shut them off.