PMC4307958_01
A. During hyperventilation, rhythmic theta activity and spikes started from the right frontotemporal regions. The ECG trace showed a baseline HR of approximately 80 bpm. 27 s after the beginning of the seizure, the HR dropped; after 47 s, an asystole lasting for 9 s appeared, then the baseline cardiac rhythm returned. During the asystole, the EEG showed hypersynchronous slowing and amplitude increasing of the background electrical activity. Then the brain electrical activity flattened, and the patient presented with loss of consciousness. B. Coronal IR sequence (left panel) with gadolinium showing a meningioma of the left cavernous sinus (white arrow) and a meningioma of the right frontotemporal convexity (red arrow). Coronal FLAIR image (right panel) showing postactinic white matter hyperintensity of the right temporal lobe.
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Indeed, a prolonged EEG monitoring allowed the recording of one typical episode demonstrating a right frontotemporal epileptic seizure with progressive bradycardia leading to a 9-second asystole (Fig. 2A). The brain MRI confirmed the presence of multiple meningiomas together with postactinic gliosis of the right temporal lobe (Fig. 2B).