[HSF] anomalous partial PV and PAH

[Tea Acuff]

I was asked to fix an anomaolous pulmonary venous drainage of the left upper lobe  to a small vertical vein connected to the innominate vein in a 35 year old welder. He has RV failure with Class iii-iv symptoms. His pumonary resistance is 12 Woods units and his PA and RV systolic pressures are in the 80's and do not respond to dilatory agents. His PA are large and his chest xray mostly unremarkable.
Two questions:
1) Is this PV drainage likely causative of or contributory to the PAH?
2)Would repair help?
I said not likely on either, but would ask for other opinions.
Tea