He made it through the procedure!!!!!! We'll know how much it helped within hours. I've just talked with Dr. Steinberg. He doesn't know to what extent the valve was causing the breathing problems; it could have been 50%, 75%, etc. He believes it was a big part of it. He also said that, based on yesterday's x-ray, there wasn't enough fluid on the lungs to risk putting needles in to drain fluid.
Thank you, Lord!!! And Dr. Steinberg and team.