Transcranial Doppler and cerebral augmentation in acute ischemic stroke

Area of Science:

• Neurology
• Vascular Surgery
• Medical Imaging

Background:

• Acute stroke management strategies aim to restore cerebral perfusion.
• Partial aortic occlusion is a technique explored to augment collateral blood flow.
• Assessing its impact on cerebral arterial flow is crucial for patient outcomes.

Purpose of the Study:

• To evaluate the effect of partial aortic occlusion on arterial flow velocities in acute stroke patients.
• To determine if Transcranial Doppler ultrasound (TCD) can monitor these changes.
• To correlate flow velocity changes with patient outcomes.

Main Methods:

• Patients with acute stroke underwent partial aortic occlusion following thrombolysis.
• Transcranial Doppler ultrasound (TCD) measured arterial flow velocities (MFV, PSV, EDV) at baseline and during balloon inflation.
• Augmented flow velocity percentages were calculated and compared between good and poor outcome groups.

Main Results:

• In 8 analyzed patients (MCA or TICA occlusions), partial aortic occlusion did not significantly alter mean MFV or PSV.
• However, mean augmented MFV% was significantly higher in patients with good 90-day outcomes (65.4%) compared to those with poor outcomes (-3.7%, P=.03).
• Anterior cross-filling occurred in 3 patients, with 2 achieving good outcomes.

Conclusions:

• Transcranial Doppler ultrasound monitoring during intra-aortic balloon inflation (IABI) shows potential for predicting outcomes in acute stroke.
• This non-invasive monitoring may guide treatment adjustments for improved patient recovery.