What are the fundamental outflow tract views and what do they evaluate?

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The left and right ventricular outflow tract views are used to directly visualize the pathways from the ventricles into the great arteries. By following the flow from the ventricle through the respective semilunar valve into the aorta or pulmonary artery, you can assess whether the outflow tracts are patent, identify anomalies in origin or course of the great arteries, and detect infundibular (subvalvular) obstruction that can cause stenosis. These views also help determine whether the ventricles are connected to the correct great artery (ventriculoarterial alignment) and can reveal discordant connections seen in conditions like transposition of the great arteries or double outlet right ventricle. The four-chamber view mainly evaluates atrial and ventricular septa and chamber size, while sagittal views or Doppler of other vessels serve different purposes; they don’t specifically address the outflow tracts in the way these views do.