Cyanotic heart defect chest x ray
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-In-Chief: Keri Shafer, M.D. [2], Atif Mohammad, M.D.; Kalsang Dolma, M.B.B.S.[3]
Overview
Chest X Ray
A chest radiograph is helpful in differentiating between cardiac and pulmonary disorders.
Heart Shape and size -
- Patients with left-sided obstructive lesions may have cardiomegaly due to heart failure.
- Tetralogy of Fallot – Boot-shaped (coeur en sabot) heart.
- D-transposition of the great arteries – Egg-on-a-string pattern caused by a narrow mediastinal shadow produced by the anterior-posterior rather than right-left relationship of the great arteries.
- Total anomalous pulmonary venous connection-A large supracardiac shadow due to anomalous pulmonary vein and persistent left superior vena cava can be seen, which together with normal cardiac shadow forms a snowman appearance.
Pulmonary vascular markings —
- The pattern of pulmonary blood flow depends upon the specific cardiac lesion.
- Decreased pulmonary vascular markings occur in most cyanotic CHD lesions
- Increased pulmonary vascular markings occur in patients with truncus arteriosus or mixing lesions, such as common atrioventricular canal, as pulmonary vascular resistance falls after delivery.