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Transcranial Doppler (TCD) is useful in stroke prevention for at least three purposes: diagnosis of intracranial stenosis, detection of right-to-left shunt in patients with suspected paradoxical embolism, and detection of microemboli in patients with carotid stenosis. Other uses may include...
Evaluating the intracranial arteries emergently as a stroke is in progress uniquely positions the transcranial Doppler (TCD) as a tool to not only help diagnose the cause of the stroke but to serially monitor the cerebral arteries before, during, and after emergent pharmaceutical and/or...
Waveform recognition is an essential step in the interpretation of vascular ultrasound studies. Waveforms can vary widely as the result of systemic and focal hemodynamic changes in the precerebral and particularly intracranial vessels. Waveform pattern recognition can aid or refine the...
IntroductionDespite ongoing studies, the relationship of plaque echomorphology with increased risk of stroke in patients undergoing carotid angioplasty and stenting (CAS) remains elusive. The aim of this study is to examine whether carotid plaque echolucency is associated with greater plaque...
PurposeThe use of computed tomographic angiography (CTA) has increased dramatically whereas angiography (ANGIO) has decreased proportionally. The purpose of this study is to evaluate the impact of this trend on internal carotid artery (ICA) ultrasound velocity criteria in the vascular...
Transcranial Doppler (TCD) with agitated saline injection and transesophageal echocardiography (TEE) are used to evaluate cryptogenic stroke and transient ischemic attack (TIA) patients for patent foramen ovale (PFO). The role of the PFO may be to serve as a passageway for emboli from the...
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