My Heart! My Heart!

Hmmm...last night my Fitbit reported that my heart rate went down to 38. I checked the other data. The previous night it went down to 42. The night before that, 40. In fact, every night I've worn the sensor to bed, it reports my heart rate dropping into the low 40s between about 3 and 6 AM (when I get up). Should I be worried?

When I was in the hospital and they administered morphine, my heart rate dropped into the 40s. The hospital freaked out and put me on a heart monitor for three days and conducted endless tests on my heart, to which the cardiologist said everything was perfectly normal. (Did my heart rate drop that low when I was in the hospital? If it did, no one burst into my room to wake me up.) But my medical records from that day diagnose me with an "abnormal electrocardiogram" with a numerical code for "short QT syndrome."

I'm in the processing of dumping my current GP, the one who put me on the prescription that gave kidney stones, and I'm seeing my new GP for the first time tomorrow. I'll definitely bring this up with him. And I have to call the cardiologist.