What are the non‑cardiac causes of radiating chest pain?

Non-Cardiac Causes of Radiating Chest Pain

Non-cardiac radiating chest pain originates from thoracic structures (lungs, pleura, esophagus, chest wall), abdominal organs (stomach, gallbladder, pancreas), or musculoskeletal/neurological sources, with life-threatening causes including pulmonary embolism, aortic dissection, and pneumothorax requiring immediate exclusion. 1

Life-Threatening Non-Cardiac Causes (Immediate Exclusion Required)

Vascular

• Pulmonary embolism (PE): Can present with minimal symptoms; elevated D-dimer warrants CT pulmonary angiography 1
• Aortic dissection/aneurysm (AAS): Persistent, non-specific pain unrelieved for hours; requires echocardiographic and/or CT evaluation 1

Pulmonary

• Pneumothorax: Acute onset, pleuritic pain
• Pneumonia with pleuritis: Associated with fever, dyspnea 1

Common Non-Cardiac Causes by Anatomic Origin

Esophageal (Most Common Non-Cardiac Cause) 2, 3, 4

• Gastroesophageal reflux disease (GERD): Can mimic angina; burning, retrosternal pain worsening after meals or at night; relieved by antacids 2
• Esophagitis: Drug-induced (NSAIDs, bisphosphonates, potassium, iron), infectious (candidiasis), or eosinophilic 2
• Esophageal motility disorders: Achalasia, distal esophageal spasm, nutcracker esophagus; squeezing retrosternal pain with dysphagia 2

Musculoskeletal (Most Prevalent Overall) 2, 5, 6

• Costochondritis: Most common (42% of nontraumatic musculoskeletal chest pain); diagnosed by physical examination showing reproducible chest wall tenderness 6
• Muscle strain and cartilage inflammation
• Cervical radiculopathy: Can cause radiating chest pain 5
• Thoracic spine pathology: Meningioma, neuroma, herniated disk, nerve root impingement 7

Pulmonary (Non-Life-Threatening)

• Pleuritis: Sharp, positional, inspiration-related pain 1

Gastrointestinal (Beyond Esophageal)

• Peptic ulcer disease/gastritis: Epigastric pain radiating to chest 2, 5
• Biliary disease: Right-sided or epigastric pain radiating to shoulder/back 1
• Pancreatitis: Upper abdominal pain radiating to back 1

Psychiatric/Psychological 2, 8, 5

• Panic disorder, anxiety disorders: Diagnosis of exclusion but common; associated with recurrent symptoms despite negative cardiac workup
• Somatoform disorders: Can mimic acute coronary syndrome

Diagnostic Approach Algorithm

Step 1: Pain Characterization

Red flags AGAINST cardiac origin (suggesting non-cardiac):

• Hyperacute, fleeting duration
• Pleuritic (worsens with inspiration)
• Positional
• Localized to single point
• Stabbing quality 1

Features suggesting specific non-cardiac causes:

• Heartburn, regurgitation, dysphagia → esophageal 2
• Reproducible chest wall tenderness → musculoskeletal 6
• Associated with meals, relieved by antacids → GERD 2

Step 2: Initial Evaluation After Cardiac Exclusion

When cardiac causes ruled out (negative ECG, troponins, stress testing, or coronary imaging) 2:

First-line imaging based on clinical suspicion 1:

• Chest X-ray: Pneumonia, pneumothorax, pleural disease
• Transthoracic echocardiography: Pericarditis
• Abdominal ultrasound: Biliary disease, upper abdominal pathology

Step 3: Targeted Evaluation for Persistent Symptoms

For suspected esophageal origin 2:

1. Trial of high-dose proton pump inhibitor (PPI) for 2-4 weeks
2. If symptoms persist or alarm features present (dysphagia, odynophagia, GI bleeding, weight loss, recurrent vomiting) → upper endoscopy within 2 weeks
3. If endoscopy normal and PPI trial fails → esophageal function testing and pH monitoring

For suspected musculoskeletal origin 6:

• Physical examination demonstrating reproducible tenderness is diagnostic for costochondritis
• If neurological symptoms or chronic pain >6 months → consider spine MRI for thoracic pathology 7

For suspected psychiatric origin 2, 8:

• Screen for panic disorder, anxiety, depression in patients with recurrent symptoms despite negative workup
• Consider cognitive behavioral therapy or neuromodulators (venlafaxine, sertraline, imipramine) 4

Critical Pitfalls to Avoid

1. Never assume chest pain is non-cardiac without objective cardiac exclusion: Women, elderly, diabetics, and patients with renal dysfunction frequently present atypically 8, 5

2. Do not miss functional coronary artery disease: Vasospastic angina and microvascular angina require coronary angiography with spasm-provocation testing for diagnosis 9

3. Recognize that multiple causes can coexist: Cardiac and esophageal pain may occur in the same patient 10

4. Persistent or recurrent symptoms despite negative stress test or anatomic cardiac evaluation warrant evaluation for non-cardiac causes 2

5. In patients with recurrent unexplained chest pain after cardiac/pulmonary exclusion, evaluation for gastrointestinal causes is reasonable (Class IIa recommendation) 2