Sir My resting heart rate 48 to 56 always since last 8 months when I observed and chest discomfort leg restlessness anxiety some time and  body shaking feel last 20 days. 6 months back and one year back two time checked ecg echo tmt thyroid function sugar electrolyte tropinin t and I and ckmb all the reports were normal. And in ecg one time 60 heart beat one time and 55 second time and mentioned as sinus arrthyamia with sinus bradycardia. Please advise what should I do now. I have gerd problem and vitamin b12 and D dificency for that I had taken treatment. Symptoms now. Chest discomfort Leg restlessness or feet cold feel Body shaking when more hungry that time heart beat 48 to 50 Some time weakness.