Pulmonary valve echo motion in clinical practice.

Examination of the pattern of pulmonary valve echo motion provides useful diagnostic information in a variety of clinical situations. This report describes the normal patterns and variations in pulmonary valve echo motion. It further discusses the applications and limitations of M-mode and cross-sectional echocardiography in detecting obstruction to right ventricular outflow at both the valvular and infundibular level; the wide ranging effects of increases in pulmonary artery pressure on the pulmonary valve echogram; and alterations in right ventricular compliance and volume which may combine to produce diastolic opening of the pulmonary valve. It is emphasized that the thin pliable pulmonary leaflets move in response to local alterations in pressure and flow. The patterns of pulmonary valve echo motion, therefore, although not specific for any particular clinical disorder, may provide valuable, indirect information concerning local pressure and flow characteristics and, as such, may prove extremely helpful when applied to a specific clinical situation.