What Is The Treatment For Bradycardia?

I am 31 years old. I was taken to the hospital last wednesday because I passed out. They had to give me epinephrine on the way to the hospital because my heart rate was so low. My potassium level was 2.3. They have it up to 3.5 but I am having muscle spasams, week in my arms and legs, dissy, can t eat because I can t swallow. It feels like I am going to throw up. Hard to walk or do anything. Almost feels like flu symptons. Heart will race enven when I am just sitting. I have been to two hospital. They have checked my heart, liver, kidneys and ran several other tests. They don t know why I am not getting better since they have my potassium at 3.5. Help!!