My aortic valve was replaced with my pumonary value, which was replaced with a cadaver valve in 1999. For years since 1999 no change was considered a possible problem. Maybe it was. Where is the use of Zephyrr valves? Ask your doctor about Zephyr Valves, a minimally invasive option for severe COPD/emphysema.
I'm not sure but the arteries to and in your right lung narrow and can stiffen or spasm. They may not be stent candidates.