Thanks for writing in.
I am a qualified and certified cardiologist. I read your question with diligence. Human heart beats for 100,000 times a day (72x60x24). One percent of these can be normal beats out of rhythm which is benign arrhythmia
. Some people are more perceptive and sensitive to it and find it troublesome. Your problem of pain on movement, shooting down to left arm would mean that cervical spondylosis
needs to be excluded. I would suggest that you seek an appointment with a doctor who would do a thorough physical examination and EKG. If needed, Holter test (24 hour recording of EKG), Cervical Spine
X-ray and echocardiography
if needed shall be done. All this is needed before any medication is started as you have discomforting symptoms. Good Luck.
With Best Wishes
Dr Anil Grover