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You should see your cardiologist again... Irregular heart beats need to be DOCUMENTED by ElectroCardioGram (EKG). Standard ECG records the electrical activity of the heart, for a few seconds. It can detect the arrhythmia
occurring during that time only. If the episode occurs randomly or precipitated by a specific activity like exercise, one needs Holter or event monitor.
TMT – Treadmill exercise ECG; may also be necessary to evaluate ischemia
(reduced blood flow / Coronary Artery
Your orthopaedician could check for cervical spondylosis
– root pain from compression.
Wishing speedy recovery