Comparison of Different Methods of Valsalva Maneuver for Right-to-left Shunt Detection by Contrast-Enhanced Transcranial Doppler

Comparison of Different Methods of Valsalva Maneuver for Right-to-left Shunt Detection by Contrast-Enhanced Transcranial Doppler

Abstract We evaluated 298 patients for right-to-left shunt (RLS) detection by contrast-enhanced transcranial Doppler at rest state (RS), during the conventional Valsalva maneuver (CM), and during the modified Valsalva maneuver (BM: blowing into the connecting tube of a sphygmomanometer at 40 mm Hg f...

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Veröffentlicht in:Ultrasound in medicine & biology 2016-05, Vol.42 (5), p.1124-1129
Hauptverfasser: Guo, Yu-Zhu, Gao, Yong-Sheng, Guo, Zhen-Ni, Niu, Peng-Peng, Yang, Yi, Xing, Ying-Qi
Format: Artikel
Sprache:eng
Schlagworte:
Adult
Algorithms
Contrast-enhanced transcranial Doppler
Female
Foramen Ovale, Patent - diagnostic imaging
Humans
Image Enhancement - methods
Image Interpretation, Computer-Assisted - methods
Male
Radiology
Reproducibility of Results
Right-to-left shunt
Sensitivity and Specificity
Ultrasonography, Doppler, Transcranial - methods
Valsalva Maneuver
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Zusammenfassung:Abstract We evaluated 298 patients for right-to-left shunt (RLS) detection by contrast-enhanced transcranial Doppler at rest state (RS), during the conventional Valsalva maneuver (CM), and during the modified Valsalva maneuver (BM: blowing into the connecting tube of a sphygmomanometer at 40 mm Hg for 10 s) in random order, and the degree of RLS along the time of the first microbubble occurrence was recorded. The positive rates were 21.8%, 36.9% and 47.3% for RS, CM and BM, respectively ( p  
ISSN:0301-5629
1879-291X
DOI:10.1016/j.ultrasmedbio.2015.12.020