A rule-out is a statement about one diagnosis on one day. It says the patient is not having a myocardial infarction now. It says nothing about the next three years, and the discharge letter that records only 'ACS excluded' throws away the number that does.
A maximum high-sensitivity troponin above the assay's low cut-off, in someone whose infarction has been excluded, marks a patient with a meaningfully raised risk of a hard cardiac event. That is a prompt to check blood pressure, lipids, glucose and smoking status, and to make sure someone owns the follow-up - not a prompt to order more imaging, which was tested and did not help.
So the habit is small: put the actual peak troponin value in the discharge summary, alongside the assay used, and say in one line what the risk factor review found. The general practitioner reading it in a fortnight can then do something with it. Without the number, they cannot tell the difference between a patient whose troponin was undetectable and one who sat just under the threshold.
- Record the peak high-sensitivity troponin value and the assay name in every chest pain discharge summary.
- Add one line on blood pressure, lipids, glucose and smoking before the patient leaves.
- Name who is responsible for the follow-up, and by when.
- Distinguish 'undetectable' from 'detectable but not rising' in the letter - they are different patients.
- Resist the reflex to book outpatient imaging as a substitute for risk factor management.
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