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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.

Chest radiography in cardiovascular disease

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

RapidFull
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Escalate

Do not delay reperfusion, CT aortography or treatment of pulmonary oedema for a chest radiograph when the clinical diagnosis already demands urgent action.

Synopsis

Use the chest radiograph as a targeted assessment of cardiac size, pulmonary circulation, devices and alternative thoracic disease without over-reading a normal film.

  • Confirm patient, date, projection, rotation, inspiration and exposure before interpreting the heart or mediastinum.
  • Cardiothoracic ratio is meaningful on a well-inspired PA film; AP portable magnification can mimic cardiomegaly.
  • Upper-lobe venous diversion, interstitial markings, septal lines, perihilar air-space opacity and pleural effusions form a congestion spectrum.
  • Acute pulmonary oedema can occur with a normal-sized heart, and an early film may be normal.
  • A widened mediastinum is neither sensitive nor specific for acute aortic syndrome; definitive aortic imaging is required when suspected.
  • Check device generator, lead course, tip position, integrity and complications against prior films.
  • Always inspect lungs, pleura, bones and soft tissues for non-cardiac explanations of symptoms.

Key red flags

Pulmonary oedema

Bilateral perihilar or diffuse air-space opacity, vascular indistinctness, septal lines and effusions support congestion; correlate with rapidity and volume status.

Aortic concern

Mediastinal widening, abnormal aortic contour, apical cap or displaced calcification can raise suspicion but a normal film does not exclude dissection.

Device complication

New lead discontinuity, displacement, pneumothorax, haemothorax or generator change after implantation requires prompt device and clinical review.

Investigation priorities

01
PA and lateral chest radiographsFirst step

Assess heart size, pulmonary vasculature, pleura and thoracic alternatives in a stable ambulant patient.

Management branches

Preferred routeSuspected heart failure

Dyspnoea, oedema or signs of congestion

  1. Assess severity and treat hypoxaemia or pulmonary oedema immediately when present.
  2. Obtain ECG, natriuretic peptide, renal function and chest radiograph as clinically appropriate.
  3. Use the film to identify congestion and alternative lung disease, not to measure ejection fraction.
  4. Arrange echocardiography under the heart-failure pathway; urgency follows natriuretic-peptide level and clinical condition.
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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 NG106: Chronic heart failure in adults
  • NICE CG95: Recent-onset chest pain
  • ESC 2024 Guidelines for chronic coronary syndromes
  • ESC 2024 Guidelines for peripheral arterial and aortic diseases

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