Several : Common types of stress tests are either nuclear based or echo based . Nuclear tracer goes everywhere blood goes, so if the scan shows a "cold spot" where no tracer is found a blockage is possible. Echo based studies are based on wall motion. If at peak stress theres a wall motion abnoramilty than a blockage may be responsible.If one can't walk a chemical to simulate execise can be used.
Answered 7/23/2012
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