Technical and anatomical background of four-gate microembolus detection in the middle cerebral artery by transcranial Doppler ultrasound T. Hansberg1, D.W. Droste1, M. Ritter1, S. Hermes1, D. Hammel2, V. Kem�ny1, G. Schulte-Altedorneburg1, D.G. Nabavi1, Hans H. Scheld2, E.B. Ringelstein1. 1Department of Neurology; 2Department of Thoracic and Cardiovascular Surgery, University of M�nster, Germany

1997 ◽  
Vol 5 ◽  
pp. 42
Keyword(s):  
Middle Cerebral Artery ◽  
Doppler Ultrasound ◽  
Cerebral Artery ◽  
Transcranial Doppler ◽  
Cardiovascular Surgery ◽  
Transcranial Doppler Ultrasound

scholarly journals Reproducibility of Transcranial Doppler ultrasound in the middle cerebral artery

2018 ◽  
Vol 16 (1) ◽  
Author(s):  
Jakub Kaczynski ◽  
Rachel Home ◽  
Karen Shields ◽  
Matthew Walters ◽  
William Whiteley ◽  
...  
Keyword(s):  
Middle Cerebral Artery ◽  
Doppler Ultrasound ◽  
Cerebral Artery ◽  
Transcranial Doppler ◽  
Transcranial Doppler Ultrasound

Predictability of Cerebral Embolization from Aortic Arch Manipulations During Thoracic Endovascular Repair

2011 ◽  
Vol 77 (10) ◽  
pp. 1399-1402 ◽  
Author(s):  
Karen Kim ◽  
Tyler Reynolds ◽  
Carlos Donayre ◽  
George Kopchok ◽  
Rodney White ◽  
...  
Keyword(s):  
Middle Cerebral Artery ◽  
Aortic Arch ◽  
Doppler Ultrasound ◽  
Cerebral Artery ◽  
Transcranial Doppler ◽  
Transcranial Doppler Ultrasound ◽  
Thoracic Endovascular Aortic Repair ◽  
Endovascular Aortic Repair ◽  
Left Middle Cerebral Artery ◽  
Aortic Repair

There is no sensitive tool to monitor embolic events and predict patients at a risk for strokes during thoracic endovascular aortic repair. We examined the relationship between the number of high intensity transient signals (HITS) by transcranial doppler ultrasound and the extent of atherosclerotic plaques in aortic arch. Thirteen patients were treated as a part of a single center United States Food and Drug Administration-approved investigational device exemption for various thoracic aortic pathologies. Bilateral transcranial doppler ultrasound transducers recorded the number of HITS. CT angiography and intravascular ultrasound were used to measure the thickness of mural thrombi and determine their arch location. All 13 patients had detectable HITS, and one patient sustained a stroke. Eleven patients had quantifiable mural thrombi. The highest HITS were observed in patients with thrombi in zones 2 to 3. All three patients with bovine arch had more HITS in the right middle cerebral artery whereas the patients with normal arch anatomy had more HITS in the left middle cerebral artery. The presence of mural thrombi in zones 2 and 3, irrespective of their thickness, was associated with increased HITS during thoracic endovascular aortic repair. This is the first study to characterize the significance of mural thrombi in aortic arch and their relationship to embolic events during aortic arch manipulations.

scholarly journals Transcranial Doppler Ultrasound Criteria for Recanalization After Thrombolysis for Middle Cerebral Artery Stroke

Stroke ◽  
2000 ◽  
Vol 31 (5) ◽  
pp. 1128-1132 ◽  
Author(s):  
W. Scott Burgin ◽  
Marc Malkoff ◽  
Robert A. Felberg ◽  
Andrew M. Demchuk ◽  
Ioannis Christou ◽  
...  
Keyword(s):  
Middle Cerebral Artery ◽  
Doppler Ultrasound ◽  
Cerebral Artery ◽  
Transcranial Doppler ◽  
Transcranial Doppler Ultrasound ◽  
Middle Cerebral Artery Stroke

Cerebrovascular Reactivity in Migraineurs as Measured by Transcranial Doppler

Cephalalgia ◽  
1990 ◽  
Vol 10 (2) ◽  
pp. 95-99 ◽  
Author(s):  
T Darrell Thomas ◽  
Gary J Harpold ◽  
B Todd Troost
Keyword(s):  
Blood Flow ◽  
Middle Cerebral Artery ◽  
Flow Velocity ◽  
Doppler Ultrasound ◽  
Cerebral Artery ◽  
Transcranial Doppler ◽  
Blood Flow Velocity ◽  
Transcranial Doppler Ultrasound ◽  
Cerebrovascular Reactivity ◽  
Artery Blood Flow

Transcranial Doppler ultrasound is a relatively new diagnostic modality which allows the non-invasive assessment of intracranial circulation. A total of 10 migraine patients were studied and compared to healthy controls without headaches. Migraineurs during the headache-free interval demonstrated excessive cerebrovascular reactivity to CO2, evidenced by an increase in middle cerebral artery blood flow velocity of 47% ± 15% compared to 28% ± 14% in controls ( p = 0.026). Differences between the two study groups revealed no significant decrease in middle cerebral artery blood flow velocity with hypocapnia. However, the differences between middle cerebral artery blood flow velocity during hyperventilation and CO2 inhalation were significantly different ( p = 0.004) comparing migraineurs and controls. Instability of the baseline blood flow velocities was also noted in migraineurs during the interictal period. Characteristics which may allow differentiation of migraineurs from other headache populations could possibly be obtained from transcranial Doppler ultrasound flow studies.

Sign in / Sign up

Export Citation Format

Share Document