does tachycardia cause weight loss

i am 32 and  have had tachycardia for a year now and when this started i was one 145lbs now i am 115lbs. no change in diet or exercise well actually less exercise. i have been to many doctors to try and figure out the cause of my sudden weight loss without any answers. then i got to thinking maybe because my heart rate is so fast 120-140 at rest 150-190 standing or walking. that maybe this could be the coulprit.
i live in a small town in texas with few health care resources and my cardiologist wants me to go to dallas to try and figure out the cause of the tachycardia i have had an EP study and wore a halter for a month show constant tachycardia some atrial flutters.  but its just to far and i only feel bad at 175 or above. my question is does anyone with continous tachycardia have weight loss.

[jrbon]

Has your thyroids been tested??

Its hyperactivity can produce tachys and weight lost.

Jesus.