However, the clinical circumstances surrounding each patient make the decision on whether to do a cath vs. a stress test one of individual judgement by the physician. This information helps tremendously when a cath is done because blockages that are found can be correlated with stress test data to confirm how severe the blockage is. Often blockages are found during a cath, and the functional significance is not known because a stress test hasn't been done. Hopefully, they can explain their choice along the same lines as how I've answered your question. I hope you find this information useful.
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