Which valve and secondary finding are associated with the 'flying W sign on spectral Doppler...

Comprehensive and Detailed Explanation From Exact Extract:

The 'flying W' sign refers to a characteristic spectral Doppler and M-mode pattern observed in the pulmonic valve inflow in patients with pulmonary hypertension. This pattern represents mid-diastolic notching or fluttering caused by increased pulmonary artery pressure and delayed right ventricular relaxation.

This sign is associated specifically with the pulmonic valve and pulmonary hypertension, not with prostheses or tricuspid valve pathology.

This finding is discussed in echocardiography and pulmonary hypertension guidelines and texts【16:Textbook of Clinical Echocardiography, 6e†p.280-285】【12:ASE Pulmonary Hypertension Guidelines†p.300-305】.