Bio AVR 2011, 9 years ago. Last but one echo 2018 showed no deterioration. I was told by my GP that I was VitD deficient and to take the highest over the counter supplement. Took for 18 months, then felt some arrhythmia so looked it up and discovered that VitD in high doses can cause this. At the same time, I read two papers stating that high dose VitD had caused unexpected calcium build up in bio valves. I stopped taking it. Recent echo showed calcification. Expected followup appointment with cardiologist did not happen due to COVID restrictions, telephone instead with cardiology nurse who just had a list of questions to ask me and could not answer my query as to whether I should resume VitD, stop it or take a lower dose. Just wondered if anyone else has come across this.