Last updated: April 6, 2026, 6:50 PM Pacific Time (PDT)
Symptom-first framework for acute or subacute chest pain. Stabilize first, then separate ACS, aortic catastrophe, pulmonary embolism, pneumothorax, pericardial causes, and lower-risk chest-wall or GI mimics.
AllImmediate stabilizationCardiacVascularPulmonary / pleuralBack to Main Page
Interactive diagnostic assistant
Activate the assistant to re-rank likely chest-pain causes from partial clinical data.
Presentation
Pain characteristics
Associated clues
Risk context
Optional ECG findings
Likely diagnoses from entered data
Recommended next labs, imaging, and diagnostics
Flowchart
First Pass
Chest pain is a triage symptom before it becomes a diagnosis
Identify unstable or time-sensitive causes first: ACS, aortic syndromes, PE, tension pneumothorax, tamponade, and esophageal rupture when context suggests it.
↓
Immediate stabilization
Act first on life-threatening physiology
Shock, severe hypoxemia, syncope, tearing pain, persistent ischemic symptoms, or rapidly worsening respiratory compromise should move ahead of routine risk stratification.
Cardiac / ischemic
Pressure / exertional
ACS or ischemic chest pain
Pressure-like, exertional, radiating pain with dyspnea, nausea, or diaphoresis should keep ischemia high on the list.
Positional / pleuritic
Pericarditis or pericardial process
Positional or pleuritic pain may still be cardiac, especially with diffuse ECG changes or viral context.
Vascular catastrophe
Tearing + abrupt
Aortic dissection or acute aortic syndrome
Abrupt severe pain, pulse deficits, neurologic symptoms, or syncope should raise concern quickly.
Pleuritic + dyspnea
Pulmonary embolism
Acute pleuritic pain, dyspnea, tachycardia, or DVT risk factors support PE reasoning.
Pulmonary / pleural
Sudden unilateral
Pneumothorax
Sudden pleuritic pain with dyspnea or unilateral findings should redirect attention here.
Fever + cough
Pneumonia or pleuritic respiratory infection
Infectious pulmonary causes can present primarily as chest pain with dyspnea.
Lower-risk and noncardiac mimics
Reproducible
Chest-wall or musculoskeletal pain
Reproducibility lowers concern for ACS, but does not absolutely exclude it in the wrong context.
Burning / post-prandial
GI or esophageal chest pain
Reflux and esophageal sources can mimic ischemic symptoms, especially when the story is less exertional.