Answer
It could be some sort of spinal problem such as disk
compression or it
could just be muscle spasms. Did they do any x-rays to see if
you have
arthritis or degenerative changes or a disk problem in your
upper back? I
am not sure whether the heart rate and faintness you experienced are
related to the back pain or not. Severe pain can of course cause these
symptoms, but if your heart rate is always elevated even when
the pain
isn't there, something else may be going on. I'd get another
opinion.
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