follow up appointments measured it at 470, and 487. Exercise stress test
showed prolongation of the QTc interval which got above 500 and also sudden drop in BP during cool down period of test. Genetic tests recently came back negative for the known mutations causing LQTS1-12.
Other history: panic attacks since age 7 with very bad episodes after drinking caffeine, taking celexa, numbing shot at dentist, first few months after my daughter was born.