Transcranial Doppler Ultrasound Pulsatility Index: Utility and Clinical Interpretation

2021 ◽  
pp. 357-376
Author(s):  
Oscar M. Pinillos ◽  
Camilo N. Rodríguez ◽  
Ryan Hakimi
2011 ◽  
Vol 7 (4) ◽  
pp. 445-455 ◽  
Author(s):  
Alex E. Roher ◽  
Zsolt Garami ◽  
Suzanne L. Tyas ◽  
Chera L. Maarouf ◽  
Tyler A. Kokjohn ◽  
...  

2021 ◽  
pp. 154431672110023
Author(s):  
Winnie Nguyen ◽  
Tammy Albanese ◽  
Vanessa Tran ◽  
Anne Moore ◽  
Laligam Sekhar

This is a case report of a 35-year-old female pedestrian struck by a semi-truck. computed tomographic angiography (CTA) revealed a pseudoaneurysm at the proximal brachiocephalic artery measuring 1.8 cm in cranio-caudal length and 1.2 × 0.6 cm transverse. Just distal to the pseudoaneurysm, there was severe luminal narrowing caused by either a dissection flap or mural thrombus. Due to profound left-sided weakness, transcranial Doppler ultrasound was performed which demonstrated “hesitant” waveforms in the right middle cerebral and right vertebral arteries secondary to proximal obstruction. Hesitant waveforms display mid-systolic velocity deceleration and may also be referred to as the “bunny” waveform. Emboli monitoring of the right middle cerebral and basilar arteries were positive for active embolization


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