Why does innapropriate sinus tachycardia occur? i'm ill with mine on bisoprolol 10mg highest dose just want a cure so i can be normal and go to work!

? reversible causes: Inapproriate sinus tachycardia typically signals in imbalance in the sympathetic nervous signals --the "fight or flight" reflex. It is a sinus rate that is excessive without provocation. It is important to make sure that reversible causes of sympathetic nerve stimulation are ruled out--such as dehydration, anmia, excessive thyroid hormone, anxiety. Beta blockers first. Clonidine might help too.