Acute Chest Pain Diagnosis and Management

Life-Threatening Causes

The American College of Cardiology and European Heart Society recommend immediate exclusion of life-threatening conditions such as acute coronary syndrome, pulmonary embolism, aortic dissection, pneumothorax, and pericarditis in patients with acute chest pain 1, 2
Acute coronary syndrome is characterized by prolonged chest discomfort with radiation to jaw, neck, or left arm, associated with nausea, diaphoresis, and dyspnea, with increased likelihood in older adults and males 2
Acute pericarditis presents with sharp, pleuritic pain that improves when sitting forward and worsens supine, with widespread ST-elevation and PR depression on ECG, and pericardial friction rub may be audible 1, 3

The American College of Cardiology recommends considering musculoskeletal causes such as costochondritis or chest wall syndrome, which can be diagnosed by tenderness of costochondral joints reproducible on palpation, but notes that 7% of patients with reproducible chest wall pain may still have acute coronary syndrome 2, 3
Gastroesophageal reflux disease (GERD) can cause burning retrosternal pain, acid regurgitation, and sour or bitter taste in mouth, with pain possibly being postprandial 4

The American Heart Association and American College of Cardiology guidelines emphasize the importance of evaluating patients with acute chest pain for noncardiac causes only after negative stress test or anatomic cardiac evaluation, or low-risk designation by a clinical decision pathway, particularly in special populations such as those with sickle cell disease or post-CABG patients 1, 4
Post-CABG patients are at risk for graft stenosis or occlusion, with 10-20% of saphenous vein grafts failing within one year, and internal mammary artery grafts having 90-95% patency at 10-15 years 5

The American Heart Association, American College of Cardiology, and American Society of Echocardiography recommend a 12-lead ECG within 10 minutes of presentation to identify STEMI, new left bundle branch block, Q waves, T wave inversions, or pericarditis patterns, and cardiac troponin immediately upon presentation, even if pleuritic characteristics make ischemia less likely 6, 7
Chest radiography is recommended for pneumothorax, pneumonia, pleural effusion, or widened mediastinum, but has limited sensitivity, with normal results in 11-62% of certain conditions like diaphragmatic injuries 3

The Wells score or Geneva score can be used for pulmonary embolism pretest probability, with D-dimer and age-adjusted cutoffs for low-to-intermediate probability, and CT pulmonary angiogram for high clinical probability or elevated D-dimer 6

Leukocytosis may accompany acute coronary syndrome (ACS) as part of the inflammatory response to myocardial injury, but it is not a primary diagnostic criterion. The presence of an elevated white‑blood‑cell count should not distract clinicians from standard ACS evaluation. 8
The American College of Cardiology recommends that an electrocardiogram be performed within 10 minutes of presentation and that high‑sensitivity cardiac troponin be measured immediately, regardless of leukocyte count. Delaying these tests because of modest leukocytosis can miss time‑critical diagnoses. 8
A bedside chest radiograph should be obtained promptly to screen for alternative thoracic pathology (e.g., pneumonia, pneumothorax, mediastinal widening) while the cardiac work‑up proceeds. This imaging step is part of the ACC’s early‑chest‑pain algorithm. 8

Acute chest syndrome (ACS) in patients with sickle cell disease is a life‑threatening complication that requires immediate emergency‑medical‑service (EMS) transfer and rapid evaluation with chest radiography and pulse‑oximetry. Early identification is emphasized in ACC guidance. [9][10]
Leukocytosis may be present in ACS but is less reliable for diagnosis because sickle‑cell patients often have baseline hematologic abnormalities. Clinicians should not rely on white‑blood‑cell count alone to rule in or out ACS. 11
Management of ACS should be aggressive and include supplemental oxygen, incentive spirometry, analgesia, empiric antibiotics, and red‑cell transfusion when indicated, irrespective of the leukocyte count. This treatment protocol is supported by pediatric hematology recommendations. 11

In immunocompromised individuals, leukocytosis can be blunted or absent even in the setting of serious infection or pulmonary embolism; therefore, contrast‑enhanced computed tomography (CT) of the chest is the preferred imaging modality for definitive diagnosis. This approach is advocated by the World Society of Emergency Surgery. 12