General medical words
What Do Acute and Chronic Mean on a Report?
Acute vs chronic · say it: uh-KYOOT vs KRON-ikAlso written: acute, chronic, acute-on-chronic, subacute
Short answer
Acute means something started recently or suddenly. Chronic means it has lasted a long time or keeps coming back.
What it means
In medicine, acute and chronic describe timing, not severity. Acute means a problem started recently, often suddenly. Chronic means it has been present for a long time, usually months or more, or keeps returning.
Doctors and radiologists use these words to tell the reader whether something is new and may need attention now, or whether it has been building slowly and is part of a longer story. Subacute sits in between. "Acute-on-chronic" means a sudden worsening of a long-standing problem, such as a flare of a lung condition someone has had for years.
On scan reports, "no acute abnormality" means nothing new or sudden was seen. Chronic changes, such as old scarring or wear and tear, may still be described in the same report.
Where you may see it
- The 'Impression' section of scan reports ("No acute findings")
- Discharge summaries and hospital notes
- Diagnosis lists and problem lists, such as "chronic kidney disease"
- Emergency department letters, such as "acute exacerbation of asthma"
📄 How it looks on a report
No acute intracranial abnormality. Chronic small vessel changes.
🙅 What it does not mean
- Acute does not mean severe, and chronic does not mean mild. They describe timing.
- Chronic does not mean untreatable. Many chronic conditions are well managed.
- "No acute findings" does not mean the scan was completely normal. Older changes may still be listed.
🗒️ Questions to ask your doctor
🧾 Reports where you will see “Acute vs chronic”
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💊 Medicines whose labels mention “Acute vs chronic”
Plain-English explanations of each medicine, from its official FDA label.
- Acyclovir
An antiviral medicine of the nucleoside analogue type, used against herpesviruses
- Albendazole
an anthelmintic drug, a medicine used to treat infections caused by parasitic worms
- Allopurinol
a xanthine oxidase inhibitor, a prescription medicine that acts on uric acid
- Alprazolam
a benzodiazepine, a type of central nervous system medicine
- Amitriptyline
An antidepressant of the tricyclic type
- Amlodipine
a calcium channel blocker, a type of medicine that relaxes blood vessels
- Amoxicillin and Clavulanate Potassium
A penicillin-class antibacterial combined with a beta-lactamase inhibitor, as the label describes it
- Apixaban
A factor Xa inhibitor, a blood thinner medicine (anticoagulant)
- Artemether and Lumefantrine
an antimalarial medicine, which is a fixed combination of two blood-stage antimalarial ingredients (artemether, an artemisinin derivative, and lumefantrine)
- Atenolol
a beta-blocker (beta-adrenergic blocker). The label describes it as a beta 1-selective, or cardioselective, blocking agent.
🔗 Read more from trusted sources
- “Acute vs chronic” on MedlinePlus ↗
US National Library of Medicine
- NCI Dictionary definition ↗
US National Cancer Institute: “acute”
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General information about a medical word, not advice about your own results. Ask the clinician who ordered the test what it means for you.