I have 1 patient who is 33 yrs old, physically fit, non smoker, non alcholic, & vegetarian. His BP is in the range of 120/80 mmHg.But is heart rate is approx. 100/min.HIs ECG is normal except for some ectopic beats.

His Thyroid profile is WNL. He feels sometime a strange sensation in the left side of chest like tightness of chest but no sweating, no tiredness etc. How to proceed with this patient, plz suggest.