Transthoracic two-dimensional echocardiogram of tetralogy of Fallot with severe pulmonary valve regurgitation

Transthoracic two-dimensional echocardiogram from a parasternal short axis view of the right ventricular outflow tract (A) in a patient with tetralogy of Fallot with severe pulmonary valve regurgitation. Color-Doppler shows laminar systolic antegrade pulmonary flow (B) and laminar diastolic retrograde flow (C) that occupies the entire outflow tract, consistent with severe pulmonary valve regurgitation.