A tet spell is potentially lethal, frequently aborted with simple skills and can occur in previously pink tets. Echocardiography can reliably confirm the precise diagnosis and differentiate between valvular pulmonary stenosis and Tet. Echocardiography should not be withheld if there is any suspicion of a more complex anatomy. Right heart obstructive lesions. Medicine is a constantly changing science and not all therapies are clearly established.
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