This report describes the diagnosis of infundibular pulmonic stenosis in a Moluccan cockatoo and illustrates ancillary imaging modalities that can be used in avian cardiology.
Pulmonic stenosis refers to a narrowing of the RVOT or downstream structures and can be classified as submandibular, infundibular, valvular, or supravalvular.
In people and dogs, infundibular pulmonic stenosis is frequently congenital and associated with other congenital abnormalities, such as ventricular septal defect or tetralogy of Fallot.
30) It is unlikely that the infundibular pulmonic stenosis would result in the clinical signs expressed by the bird, but atherosclerotic lesions of the aorta or vessels of the hind limbs as well as thromboembolic disease could lead to insufficient perfusion of the extremities.
In one study of infundibular pulmonic stenosis in cats, radiographs were found to have poor sensitivity in diagnosis.
Treatment of infundibular pulmonic stenosis in mammals is usually recommended when the abnormality is associated with hemodynamic compromise evidenced by severe tricuspid regurgitation, marked atrial enlargement, or high pressure gradients across the stenosis or when clinical signs are present.
Pulmonic stenosis in the dog: 29 cases (1975-1984).
Infundibular pulmonic stenosis with intact ventricular septum: a report of 15 surgically corrected patients.