Right-to-left shunting secondary to microvascular pulmonary arteriovenous malformation demonstrated by lung perfusion scintigraphy
The Philippine Journal of Nuclear Medicine
;
: 24-26, 2011.
Article
in English
| WPRIM
| ID: wpr-633027
ABSTRACT
Right-to-left shunting is usually associated with congenital conditions involving the heart, lungs, and the blood vessels that connect both organs. It is demonstrated by echocardiography, transesophageal ultrasound, CT scan, MRI and more definitively by conventional angiography. In this paper, we present a 16-year old female who manifested with progressive dyspnea, persistent cyanosis and decreased arterial oxygen saturation. Clinical assessment and arterial blood gas parameters suggested the presence of significant shunting. However, cardiac evaluation showed no intracardiac defects. High resolution CT scan of the chest with CT angiography of the pulmonary artery also showed no evidence of pulmonary vascular malformation or shunt anomaly. Lung perfusion scintigraphy performed after intravenous administration Tc99m-MAA showed tracer uptake in the brain, spleen and kidneys signifying the presence of a right-to-left shunt in the lungs. Cardiac catheterization later demonstrated the presence of primary pulmonary telangiectasia.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pulmonary Artery
/
Telangiectasis
/
Diagnostic Imaging
/
Echocardiography
/
Cardiac Catheterization
/
Radionuclide Imaging
/
Technetium Tc 99m Aggregated Albumin
/
Diagnostic Techniques and Procedures
/
Cyanosis
/
Diagnosis
Type of study:
Diagnostic study
Limits:
Adolescent
/
Female
/
Humans
Language:
English
Journal:
The Philippine Journal of Nuclear Medicine
Year:
2011
Type:
Article
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