Diagnosis of Right-to-Left Shunts by Transcranial Doppler in Patients With Insufficient Temporal Bone Window
نویسندگان
چکیده
منابع مشابه
Diagnosis of right-to-left shunts by transcranial doppler in patients with insufficient temporal bone window.
To the Editor: I read with great interest the article entitled “Diagnosis of right-to-left shunt with transcranial Doppler and vertebrobasilar recording,”1 which appeared in Stroke. The authors studied use of vertebrobasilar circulation (VBC) monitoring for detection of right-to-left shunts (RLS) by contrast transcranial Doppler, so-called as “the bubble test.” In comparison with right middle c...
متن کاملMethodological parameters influence the detection of right-to-left shunts by contrast transcranial Doppler ultrasonography.
BACKGROUND AND PURPOSE Contrast transcranial Doppler ultrasonography is a new method to detect intracardiac right-to-left shunts, such as the patent foramen ovale. However, the methodology of the procedure varies considerably among investigators. This study was undertaken to assess the influence of methodological parameters on the results of the contrast transcranial Doppler examination in the ...
متن کاملContrast transcranial doppler ultrasound in the detection of right-to-left shunts : time window and threshold in microbubble numbers.
BACKGROUND AND PURPOSE Cardiac right-to-left shunts can be identified by transesophageal echocardiography (TEE) and by transcranial Doppler ultrasound (TCD) with the use of contrast agents and a Valsalva maneuver (VM) as provocation procedure. Currently, data on the appropriate timing of the VM, the use of a diagnostic time window, and a threshold in contrast agent microbubbles detected are ins...
متن کاملScreening for right-to-left shunts with contrast transcranial Doppler in hereditary hemorrhagic telangiectasia.
BACKGROUND AND PURPOSE Contrast transthoracic echocardiography (TTCE) is used to screen hereditary hemorrhagic telangiectasia (HHT) patients for right-to-left shunts (RLS) associated with increased stroke risk. We hypothesized that contrast transcranial Doppler (TCDc), shown to be highly sensitive for detecting RLS in patent foramen ovale, will be as comparable to TTCE for screening HHT patient...
متن کاملOptimizing the technique of contrast transcranial Doppler ultrasound in the detection of right-to-left shunts.
BACKGROUND AND PURPOSE A cardiac right-to-left shunt (RLS) can be identified by transesophageal echocardiography and transcranial Doppler ultrasound (TCD) with contrast agents and a Valsalva maneuver (VM) as a provocation procedure. This article applies the modalities of these tests detailed in previous studies to a large patient cohort and compares 2 contrast agents (saline and Echovist-300). ...
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ژورنال
عنوان ژورنال: Stroke
سال: 2008
ISSN: 0039-2499,1524-4628
DOI: 10.1161/strokeaha.107.498014