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Fig. 2 | JA Clinical Reports

Fig. 2

From: Electroencephalogram evaluation of accidental cerebral congestion during unexpected superior vena cava clamping: a case report

Fig. 2

Electroencephalogram before and after superior vena cava (SVC) clamping. This figure shows the electroencephalogram before and after the SVC clamping. The vertical axis indicates amplitude (μV). The horizontal axis indicates the time, and the arrow scale means 2 s. A Before SVC clamping; α waves and Θ waves are mixed. B During SCV clamping; brain waves disappear and flatten. C Ten minutes after SVC declamping; brain waves remain flat. D Thirty minutes after SVC declamping; the brain wave recovers, and the waveform is the same as before the clamp. E After awaking from anesthesia; β wave, which is an awakening wave, appears. The values of response entropy (RE), state entropy (SE), and burst suppression ratio (BSR) are shown

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