Brief Answer:
it is sympathetic overactivity
Detailed Answer:
Hello,
Feeling shaky and having a rapid heart beat after a hot bath is mostly due to sympathetic over-activity due to release of the
stress hormones.
You are also feeling like your heart is going to pound out of your chest - Did you count your heart rate? How much is it? Are you feeling dizzy as well with excessive sweating? Is there unbearable
chest pain too? Please let me know about these.
It is possible that your
overweight status has started to affect your heart. For this, you need to do certain basic tests like an EKG of the heart, a treadmill test to check for the efficiency of your heat beating. Also, getting a fasting
lipid profile would help to assess your
cholesterol levels that could have been increased by the overweight status.
As of now, I would suggest you to rest for a while, drink plenty of water, take some deep breaths, and try to calm down. Your heart rate should normalize soon.
If the symptoms worsen or you do not feel better in an hour, please rush to the emergency room.
Work on your weight.
Get well soon.