0 an opening or hole, especially one in the body, such as the mouth:
In seven percent of the cases, the sinus nodal artery took origin from a separate orifice within the same sinus as a major coronary artery.
The solution obtained is such as to violate this latter assumption sufficiently far downstream from the pipe orifice, however small the crossflow.
The repair consisted of double patch closure of the septal defect, reconstruction of two atrioventricular orifices, and relief of pulmonary stenosis at all levels.
One patient with a preoperative diagnosis of atrioventricular septal defect with two atrioventricular orifices was found to have a common atrioventricular orifice.
In four of our patients, the double orifice was found to represent an abnormality in the left valve of an atrioventricular septal defect.
The malaligned atrial septum was widely excised to reveal a small left atrium receiving the pulmonary venous orifices and a tiny atrial appendage.
On the first postoperative day, the stent in the orifice of the right pulmonary vein migrated to the descending aorta.
In our experience, it is the patient with unequal orifices in whom the preoperative (and in one case operative) diagnosis is difficult to make.
