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[Doppler sonogram in basilar artery thromboses]
Insights
Directional continuous-wave Doppler sonography effectively detects basilar artery obstruction. This non-invasive method aids in diagnosing critical vertebrobasilar system conditions, improving patient outcomes.
Area of Science:
- Neurology
- Vascular Imaging
Background:
- Vertebrobasilar artery obstruction poses significant neurological risks.
- Accurate and timely diagnosis is crucial for patient management.
Observation:
- Directional continuous-wave (c-w) Doppler sonography was used to evaluate 6,380 patients over 3.5 years.
- Specific criteria included bilateral sonographic silence or absent diastolic flow in vertebral arteries.
Findings:
- Seven cases of suspected basilar artery or distal vertebral artery obstruction were identified.
- Angiography confirmed basilar artery occlusion in 4 patients, stenosis in 1, and bilateral vertebral artery occlusion in 1.
- Three additional basilar artery occlusions were found via angiography, with one initially missed by Doppler.
Implications:
- Directional c-w Doppler sonography is a valuable tool for diagnosing basilar artery obstruction.
- This technique can aid in identifying critical vascular events in the vertebrobasilar system.
- Further investigation may refine Doppler criteria for enhanced diagnostic accuracy.
Abstract:
We have investigated 6,380 patients with directional c-w Doppler sonography within the last 3 1/2 years, and have suspected obstruction of the basilar artery or of both distal vertebral arteries in 7 cases. Either bilateral sonographic silence or an absent diastolic flow component of the vertebral arteries were employed as criteria in the sonographic evaluation. Angiography of the vertebro-basilar system, performed in 6 cases, confirmed the diagnoses: basilar artery occlusion was found in 4 patients, 1 patient revealed tight stenosis of the basilar artery in its entire length, and 1 patient exhibited occlusion of both distal vertebral arteries. Three further basilar artery occlusions were detected by means of angiography despite initially negative Doppler sonography within the same period of time; 1 of those patients, however, met the above criteria for basilar artery occlusion upon sonographic reevaluation on the following day. Thus, we believe that directional c-w Doppler sonography is very useful in the diagnosis of basilar artery obstruction.