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Educational draft · awaiting clinical reviewUse Rapid for revision, not patient-care decisions. Check current national and local guidance and the BNF or BNFC before acting.

Coronary CT angiography and calcium scoring

Cardiology · UK scope · Sources checked 27 Aug 2026 · Clinical review pending

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Escalate

CTCA for stable chest pain is not a substitute for the acute STEMI or high-risk NSTE-ACS pathway. New rest pain, dynamic ECG change or instability requires emergency assessment.

Synopsis

Use CT coronary angiography as the UK first-line anatomical test for appropriate stable chest pain and interpret stenosis, plaque and calcium without false reassurance.

  • NICE CG95 recommends 64-slice-or-above CTCA first-line when assessment indicates typical or atypical angina.
  • CTCA visualises lumen and plaque; a calcium score quantifies calcified plaque but does not show stenosis or non-calcified plaque.
  • NICE no longer uses stand-alone coronary calcium scoring to diagnose stable angina.
  • A zero calcium score does not exclude non-calcified coronary atherosclerosis or an acute coronary syndrome.
  • Rate regularity, breath-hold, obesity and heavy calcification affect image quality; calcium blooming can overestimate stenosis.
  • Intermediate CT stenosis may need functional imaging or validated CT-derived fractional flow reserve before invasive decisions.
  • Check pregnancy possibility, renal function where indicated, previous contrast reaction and interacting drugs before iodinated contrast and rate-control medication.

Key red flags

Contrast reaction

Bronchospasm, facial or laryngeal swelling, hypotension or collapse after contrast requires an immediate emergency response.

Investigation priorities

01
CT coronary angiographyFirst step

Exclude or define anatomical coronary disease in stable suspected angina.

Management branches

Preferred routeStable suspected angina

Typical or atypical angina without acute features

  1. Complete clinical assessment, resting ECG and baseline safety checks.
  2. Offer 64-slice-or-above CTCA under NICE CG95.
  3. If arteries are normal, reconsider non-coronary and vasomotor causes; if plaque is present, address prevention.
  4. For severe disease, uncertain significance or non-diagnostic key segments, proceed to functional imaging or invasive assessment according to risk.
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Sources and review status4 sources · checked 27 Aug 2026 · clinical review pending+
Sources

Sources and review status

National guidance is shown before implementation-dependent detail. Apply principles in context and verify current guidance when a decision affects care. Source check completed 27 Aug 2026; clinical approval remains outstanding.

  • NICE CG95: Recent-onset chest pain
  • NICE HTG429: HeartFlow FFRCT
  • ESC 2024 Guidelines for chronic coronary syndromes
  • ESC/EACVI cardiovascular CT consensus collection

Editorial contact: Doctor’s Passport editorial team. Source-check date is separate from clinical approval. Report a content problem · Content changes

Authoring stateRapid draftClinical stateAwaiting reviewJurisdictionUnited Kingdom