Role of Computed Tomography in GUCH/ACHD

Role of computed tomography (CT) in GUCH/ACHD

Computed tomography provides excellent spatial resolution and has a rapid acquisition time. Computed tomography has an excellent role in the assessment of grown up congenital heart disease (GUCH)/adult congenital heart disease (ACHD). It is good for imaging arteries and veins. CT is superior to cardiac magnetic resonance (CMR) imaging for visualising the epicardial coronary arteries, their collaterals and arteriovenous (AV) malformations. CT can also be used to assess the size of the ventricles and their function, but has an inferior temporal resolution compared to cardiac magnetic resonance imaging.

Potential drawbacks and precautions

As it is well known, the major drawback of computed tomography is the radiation risk, which cannot be avoided. Contrast related issues like the small but real potential for contrast nephropathy, allergic reactions, transient myocardial suppression and thrombotic possibility in a dehydrated polycythemic person should also be given due consideration. Careful attention to pre and post procedure hydration can take care of the potential for contrast nephropathy and thrombotic episodes to a good extent.