Yes a cardiolite test is a nuclear test. Cardiolite is a brand name of a radioactive technetium compound that's used as a tracer.
Anne400, one possible followup is a stress echocardiogram, especially if there is any doubt about whether the positive result was false. But false positive nuclear stress tests are apparently very common, especially in women because breast tissue can absorb the tracer signal making it look as if part of the heart muscle isn't perfusing properly.
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