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Fig. 4 | Critical Ultrasound Journal

Fig. 4

From: Point-of-care transcranial Doppler by intensivists

Fig. 4

Step-wise progression of cerebral circulatory arrest. a CT Head demonstrating diffuse subarachnoid hemorrhage. b Evidence of raised ICP causing decreased diastolic flow as evidenced by blunting of the spectral Doppler signal. c Further progression with diastolic flow reversal as raised ICP prevents forward flow in MCA, and even induces backwards flow. d Biphasic and oscillating flow as evidenced by net zero flow (where systolic and diastolic flow are near equal to each other), indicating the first TCD stage of cerebral circulatory arrest

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