PMC8168658_01
Preoperative imaging studies. Coronal T1 postcontrast MRI demonstrating recurrent progressive atypical meningioma (Left). 3D sagittal reconstruction of MRV demonstrating occlusion of middle/posterior third of the superior sagittal sinus (Right).
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F2
Preoperative vascular imaging showed SSS occlusion [Figure 2] and repeat surgery was recommended.
Intraoperative anesthesia record demonstrating the first moment of more sustained asystole. Although other brief asystolic instances occurred, they were too short to be recorded in the anesthesia flow sheet due to immediate recognition of trigeminocardiac reflex and cessation of stimulus.
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F3
During tumor resection, the falx was being coagulated and the patient became profoundly bradycardic, then asystolic [Figure 3].