About Video

This video clip aortic short-axis view demonstrates a thickened pulmonary valve (PV) with systolic doming and a peak gradient by color Doppler guided continuous wave Doppler of 84 mm Hg consistent with severe stenosis. Trivial pulmonary regurgitation is present. M-mode echo of the PV is normal in this patient. However, with severe stenosis, the PV may open during atrial systole and occasionally even earlier in diastole when the RV diastolic pressure exceeds the pulmonary artery (PA) diastolic pressure which is low in severe stenosis. This finding, when present, is best demonstrated by M-mode, seen in another patient with very severe pulmonary valve stenosis.