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Transcranial Doppler in acute brain stem infarction
1Department of Neurology, University of Alabama Medical Center, Birmingham, 35294.
Insights
This study examined two acute brain stem infarction patients using angiography and transcranial Doppler. Transcranial Doppler showed persistent vertebrobasilar patency, but clinical improvement was not observed, highlighting management challenges.
Area of Science:
- Neurology
- Vascular Neurology
- Neuroimaging
Background:
- Acute brain stem infarction presents diagnostic and management challenges.
- Vascular imaging plays a crucial role in stroke assessment.
- Transcranial Doppler (TCD) offers non-invasive monitoring of cerebral blood flow.
Observation:
- Two patients with acute brain stem infarctions underwent angiographic and transcranial Doppler (TCD) evaluation.
- One patient with a patent basilar artery showed clinical deterioration.
- The second patient experienced dislodgement of a left vertebral artery thrombosis during angiography, followed by thrombolytic therapy.
Findings:
- Serial TCD examinations confirmed persistent patency of the vertebrobasilar system in the second patient.
- Despite successful recanalization and maintained blood flow, the patient did not show clinical improvement.
- The first patient's clinical worsening despite a patent basilar artery remains unexplained by initial imaging.
Implications:
- This case series suggests that persistent patency of the vertebrobasilar system, as monitored by TCD, does not always correlate with clinical recovery in acute stroke.
- The findings underscore the complexity of acute stroke management and the need for multimodal assessment beyond vascular patency.
- Further research is warranted to understand factors influencing clinical outcomes in patients with acute brain stem infarctions despite successful reperfusion.
Abstract:
Two patients with acute brain stem infarctions were examined angiographically and with the transcranial Doppler. One patient had a patent basilar artery but worsened clinically. The second patient had a thrombosis of the left vertebral artery which was dislodged with the angiographic catheter. Thrombolytic therapy was initiated. Serial transcranial Doppler examinations showed persistent patency of the vertebrobasilar system although the patient failed to improve. The usefulness of the transcranial Doppler in the management of acute stroke is discussed in the context of these patients.