We have done all tests ECG, echo and holter and
thyroid. it's shows normal.Heart rate goes up often with little movement above 100 and after sitting it goes down to 55 from 100 in a minute.sometimea it goes below 50 also while sitting.or lying down. Is it normal? When heart rate goes high head tightness happens. What could be the reason if the reports are normal? Any other tests needed? Please help.