a


b


c


d

Fig. 6. Carotid angiography in an anteroposterior projection, carried out three hours after the operation: subocclusion of ICA bifurcation and bifurcation of M1 segment of MCA (a, b). Thrombosis of the descending trunk of the left MCA (an arrow), which developed 30 minutes later, and an increase of thrombotic mass volume.