<human>: Hi. A friend of mine appeared to be fine, but suddenly could not move his left arm. After 5 or so mins he started to feel a bit better. It turns out he has been having a few bouts of this per year for many years. Sometimes the pain in his heart is great. What could this be ? Your help would be very appreciated.
<bot>: Hello, It is necessary performing some tests to investigate for the possible causes underlying your complaints: - a resting ECG- a shoulder and neck X-ray study-complete blood count, PCR, ESR for inflammation.  A brain MRI and an EEG may be needed in order to exclude partial seizures that may mimic this clinical situation.  Hope I have answered your query. Let me know if I can assist you further. Take care Chat Doctor. 