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Ischaemic Heart Disease: Decubitus Angina
Related Subjects: |Assessing Chest Pain |IHD: Decubitus angina |IHD: Variant (Prinzmetal) Angina |IHD: Chronic stable angina |IHD: Cardiac Syndrome X (Microvascular Angina) |Acute Coronary Syndrome (ACS) General |Aortic Dissection |Pulmonary Embolism |Acute Pericarditis |Diffuse Oesophageal Spasm |Gastro oesophageal reflux |Oesophageal Perforation Rupture |Pericardial Effusion_Tamponade |Pneumothorax |Tension Pneumothorax |Shingles |Analgesia and Pain management
🧠 Decubitus angina is chest pain caused by myocardial ischaemia that occurs when the patient is lying flat. It is usually a marker of severe coronary artery disease and often overlaps clinically with unstable angina or heart failure-related ischaemia.
| Feature | Explanation |
|---|---|
| Definition | Angina occurring in the recumbent / supine position, often at night. |
| Mechanism | Lying flat increases venous return to the heart. This increases LV filling pressure, wall stress and myocardial oxygen demand. If coronary flow is limited by severe coronary artery disease, ischaemia and angina can occur. |
| Clinical significance | Suggests advanced coronary artery disease and may indicate unstable angina, especially if new, worsening, occurring at rest, or associated with autonomic symptoms. |
| Associated conditions |
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| Differential diagnosis |
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| Initial assessment | Treat as possible acute coronary syndrome: ECG, serial troponins, observations, oxygen only if hypoxic, aspirin if ACS suspected and not contraindicated, and urgent senior/cardiology review. |
📌 Learning tip: Decubitus angina is not simply “chest pain at night”; the key clue is ischaemic chest pain provoked by lying flat. The physiology is similar to heart failure: recumbency increases venous return, raising LV wall tension and oxygen demand. In a patient with fixed coronary stenoses, that extra demand can exceed supply and produce angina.
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