Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Uzuner, N; Horner, S; Pichler, G; Svetina, D; Niederkorn, K.
Right-to-left shunt assessed by contrast transcranial Doppler sonography: new insights.
J Ultrasound Med. 2004; 23(11):1475-1482
Doi: 10.7863/jum.2004.23.11.1475
Web of Science
PubMed
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FullText_MUG
- Co-Autor*innen der Med Uni Graz
- Horner Susanna
- Niederkorn Kurt
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- Abstract:
- OBJECTIVE: Simple diagnostic techniques such as contrast transcranial Doppler sonography (cTCDS) are popular for assessing a right-to-left shunt (RLS) because of their high sensitivity. In this study, we applied cTCDS to a large patient group with a patent foramen ovale, proved by contrast transesophageal echocardiography (TEE). METHODS: One hundred one patients with stroke, in whom a patent RLS had been shown on contrast TEE, were investigated by TCDS of both middle cerebral arteries. Injection of 10 mL of agitated saline was applied without and subsequently with the Valsalva maneuver (VM) at the beginning of the contrast agent injection, and then 10 mL of a galactose-based contrast agent was applied in the same protocol. RESULTS: In all patients, cTCDS with the galactose contrast agent showed an RLS when performed with VM, but it showed an RLS in only 59 patients without VM. In contrast, saline showed an RLS in 54 patients with VM and in 20 patients without VM. The differences in diagnostic sensitivity were statistically significant (P < .001). Eighteen patients had only 1 microembolic signal (MES) after galactose injection, whereas others had more. The mean (SD) arrival times of the MES were 9 (6) seconds (range, 1-51 seconds) after galactose injection with VM and 9 (3) seconds (range, 2-20 seconds) after agitated saline with VM. The differences were not significant. CONCLUSIONS: Contrast TCDS with VM shows a TEE-proven RLS with 100% sensitivity, but this was not true with galactose application without VM or agitated saline with or without VM. Therefore, use of the galactose contrast agent with VM is strongly recommended for detecting an RLS on TCDS. However, the arrival time and number of MESs detected need to be tested further.
- Find related publications in this database (using NLM MeSH Indexing)
- Adolescent -
- Adult -
- Child -
- Contrast Media -
- Echocardiography, Transesophageal -
- Embolism, Paradoxical - etiology
- Female - etiology
- Heart Septal Defects, Atrial - ultrasonography
- Humans - ultrasonography
- Image Enhancement - ultrasonography
- Male - ultrasonography
- Middle Aged - ultrasonography
- Polysaccharides - diagnostic use
- Sensitivity and Specificity - diagnostic use
- Statistics, Nonparametric - diagnostic use
- Ultrasonography, Doppler, Transcranial - methods
- Find related publications in this database (Keywords)
- cerebrovascular disease
- patent foramen ovale
- sonography
- transcranial Doppler sonography