Bubble stream reveals functionality of the right-to-left shunt: detection of a potential source for air embolism.
Ultrasound Med Biol
; 40(2): 330-40, 2014 Feb.
Article
en En
| MEDLINE
| ID: mdl-24262055
ABSTRACT
The existence of a right-to-left shunt may increase the likelihood of micro-embolism by allowing a flux of bubbles under hyperbaric conditions. The aim of the study was to measure the relationship between these shunts and bubbles in 10 consecutive subjects using trans-thoracic and trans-esophageal echocardiography. In video frames, all cardiac chambers were segmented and bubbles were analyzed by our proposed method and two other methods. The relationship with bubbles and shunts was divided into three classes no bubbles, 1-20 bubbles, >20 bubbles and measured over 2160 frames. Our sensitivity was 100% and our specificity was between 90.1% and 96.4%. There were 4.32-23.78 bubbles/frame in the left atrium according to our method. After the automatic analysis, shunts were graded double-blinded by two cardiologists. Consequently, we noted that aperture size does not necessarily reflect how active the right-to-left shunt is. Instead, our proposed decay curves constitute a better tool for determining functionality.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Ecocardiografía
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Interpretación de Imagen Asistida por Computador
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Microburbujas
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Embolia Aérea
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Foramen Oval Permeable
Tipo de estudio:
Diagnostic_studies
Límite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Ultrasound Med Biol
Año:
2014
Tipo del documento:
Article