I have been having very severe pain in my left shoulder and pulsating pain into my left upper arm and elbow area. I am supposed to have a persantine-thallium stress test tomorrow in which I have to raise my arms over my head. I have been taking Baclofen but this does nothing much. The pain is a heaviness and is excruciating.
Radiating Pain can be due to decreased blood supply (ischemia) of heart muscles. Percentile thallium stress test is a test to see how healthy your heart muscles are. Doctors must be suspecting that the origin of the pain is from heart and not from your shoulder. You might have had your test and results by now. Baclofen is a Chat Doctor.  Hope your either you had a cardiac pain or a musculoskeletal pain, you must be better by now.