Coronary Artery Fistula

I have a case of a 45 y/o female with a right coronary (Conus Branch) to Pulmonary Artery fistula with persistent atypical chest pain. Had a DES to the LAD and is patent after > 2 years of deployment. No evidence of pulm HTN and mild WMA on anterior LV wall and LVEF 45-50%. We believe tha the fistula creates a steal like phenomena from RCA and we are thinking to close the fistula using percutaneous coiling technique.

What are your suggestions..??