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Fig. 2 | BMC Neurology

Fig. 2

From: Adult vasovagal syncope with abdominal pain diagnosed by head-up tilt combined with transcranial doppler: a preliminary study

Fig. 2

Synchronous transcranial Doppler (TCD) displays real-time cerebral blood flow (CBF) at different stages a. Baseline CBF in the supine position at rest b. TCD in the upright position shows decreased CBF with a high-resistance waveform c. Mean CBF velocity during the drug trials continued to decrease, and the pulsatility index increased d. Mean CBF velocity, pulsatility index, and waveform quickly returned to baseline levels when the participant returned to the supine position e. CBF velocity trend-line of mean (red arrow), peak systole (green arrow) and end diastole (yellow arrow)

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BMC Neurology

ISSN: 1471-2377

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