@vex: What an awful experience! You want to learn more about the cardiac effects caused by too much Serotonin that damaged the valves in your heart?
I have no medical training; however, I have learned a little about “Carcinoid Syndrome” - a heart condition that my NET disease patients need to be aware of due to Serotonin elevated level heart valve damage.
Mayo Clinic Connect has a group named “Neuroendocrine” I belong to that I have seen discussions on Serotonin hormone elevated levels causing life-threatening “Carcinoid Syndrome”. Perhaps this will help you get needed info?!? dbamos1945