False-Positive Troponins: Clinical Misclassification, Delayed Recognition, and Health Care Costs in a Real-World Cohort.
BACKGROUND Cardiac troponin immunoassays are critical for diagnosing myocardial infarction. Up to 10% of elevated results may be falsely positive because of heterophile antibodies or macrotroponin complexes, leading to misdiagnoses. METHOD We conducted a retrospective cohort study at the Royal Melbourne Hospital, Aus...