Right Ventricle to-Pulmonary Artery Conduit Recommendations for Right Ventricle to-PA Conduit Referenced studies that support recommendations are summarized in Online Data Supplement 44. COR LOE Recommendations Diagnostic I B-NR Coronary artery compression testing with simultaneous coronary angiography and high-pressure balloon dilation in the conduit is indicated before right ventricle to-PA conduit stenting or transcatheter valve I B-NR In patients with stented right ventricle to-PA conduits and worsening PS or PR, evaluation for conduit complications should be performed, including fluoroscopy to evaluate for stent fracture and blood cultures to assess for IE.S4.3.6-3,S4.3.6-4 IIa C-LD In adults with right ventricle to-PA conduit and arrhythmia, congestive HF, unexplained ventricular dysfunction or cyanosis cardiac catheterization is reasonable to assess the Therapeutic IIa B-NR Right ventricle to-PA conduit intervention is reasonable for adults with right ventricle to-PA conduit and moderate or greater PR or moderate or greater stenosis (Table 22) with reduced functional capacity or IIb B-NR Right ventricle to-PA conduit intervention may be reasonable for asymptomatic adults with right ventricle to-PA conduit and severe stenosis or severe regurgitation with reduced RV ejection fraction or RV Synopsis Right ventricle to-PA conduits are widely used in the treatment of severe RVOT obstructive lesions including CLINICAL STATEMENTS AND GUIDELINES pulmonary atresia. These conduits may be homografts or prosthetic conduits with bioprosthetic valves used within the conduit. A minority of conduits may show early dysfunction because of kinking or aneurysmal di- lation. 