Table 2.

Indications for the treatment of peripheral pulmonary artery stenosis [7, 9]

• A reduction in the vessel diameter of greater than 40% or a reduction in the vessel diameter of greater than 30% in cases with additional right ventricular volume overload (e.g., atrial septal defect, tricuspid regurgitation, and pulmonary regurgitation) • After cavo-pulmonary anastomoses (the Glenn or Fontan shunt), pulmonary artery stenosis should be considered for therapy even if the reduction in the vessel diameter is less than 30%. • Bilateral pulmonary artery stenosis resulting in a right ventricular systolic pressure of more than 50% of the systemic pressure • Significant stenosis with a measurable gradient of greater than 20 mmHg (30 mmHg) • Pulmonary artery branch stenosis resulting in a reduction in an ipsilateral lung perfusion level of less than 20% (30%) • Hypertension in other unobstructed pulmonary artery segments