How about a health update?
After wearing the monitor for a month, rapid heart rate only occurred during times of exertion. Never happened while seated. So PSVT ruled out.
Primary Care doc drew blood and tested a whole bunch of things. He also reviewed my hospital stay records. Sent me a message a few hours later. Diagnosis is GERD and B12 deficiency.
Apparently GERD is a leading cause of all my other symptoms. B12 deficiency compounds my fatigue (and rapid heart rate).
Prilosec, B12 supplement and a low acid diet. Next four weeks kind of suck with the diet but I'm really happy that I don't have a heart condition.