Two dimensional and doppler echocardiographic diagnosis of bicuspid pulmonary valve / Diagnóstico ecodopplercardiográfico de valva pulmonar bicúspide

RESUMO

O diagnóstico de valva pulmonar bicúspide é habitualmente feito à necrópsia, ocorrendo em 7%dos pacientes com estenose pulmonar e associando-se em geral a tetralgia de Fallot ou a comunicaçäo interventricular. É relatado caso e menina de 14 anos com persistência do canal arterial, em que se detectou à ecocardiografia bidimensional valva pulmonar formada por dois folhetos espessados, abrindo-se em cúpula durante a sístole, e projetando-se abaixo do plano de anel valvar na diástole. Complementaçäo do exame com Doppler demonstoru gradiente transvalvar em 21 mmHg. Estes aspectos caractrísticos sugerem a ecocardiografia bidimensional, associada ao Doppler, como método de escolha para o diagnóstico de valva pulmonar bicúspide

ABSTRACT

The diagnosis of bicuspid pulmonary valve is usually established postmortem, occuring in 7% of patients with pulmonary stenosis and is usually associated to tetralogy of Fallot or ventricular septal defect. The authos report the case of a 14-year-old girl with patent ductus arteriosus in whom 2-D echocardiography disclosed a pulmonary valve formed of two slightly thickened leaflets that openned with the shape of a dome in systole, and moved under the valver ring plane during diastole. A Doppler examination showed a 21 mmHg transvalvar gradient. These characteristic features suggest that 2-D and Doppler echocardiography are the techniques of choice in the diagnosis of bicuspid pulmonary valve.