Chest X-Ray in STEMI Management

Primary Recommendation

The American College of Cardiology and American Heart Association recommend that patients with STEMI should have a portable chest X-ray, but this should not delay implementation of reperfusion therapy (Class I recommendation) 1, 2
The only exception is when a potential contraindication such as aortic dissection is suspected, in which case imaging becomes essential to differentiate STEMI from dissection before administering reperfusion therapy 1, 2

The chest X-ray identifies alternative diagnoses that can mimic or coexist with STEMI, including aortic dissection, pulmonary embolism, pneumothorax, and pneumonia, in patients with symptoms of STEMI 1, 3
The chest X-ray detects complications such as pulmonary edema, cardiogenic shock, or mechanical complications of MI in STEMI patients 1
The chest X-ray guides oxygen therapy decisions by revealing pulmonary congestion that would benefit from supplemental oxygen, though oxygen should only be administered if oxygen saturation is low 1, 4

The European Society of Cardiology recommends immediate activation of reperfusion pathway, with primary PCI within 90-120 minutes or fibrinolysis if PCI unavailable, in patients with STEMI 6, 4
A portable CXR should be ordered simultaneously with reperfusion preparations, but should not delay reperfusion therapy in patients with STEMI 1, 2

The chest X-ray becomes decision-critical in suspected aortic dissection, where high-quality portable CXR, echocardiography, or CT angiography must be obtained to differentiate STEMI from dissection before administering thrombolytics or anticoagulation 1, 2
The chest X-ray helps clarify the clinical picture in unclear diagnoses, such as left bundle branch block, pacing, or atypical presentation, in patients with suspected STEMI 1, 2

The American College of Cardiology and American Heart Association recommend never waiting for CXR results to initiate reperfusion therapy in straightforward STEMI, as every 30-minute delay in reperfusion increases mortality 1, 2, 6
The European Society of Cardiology recommends recognizing that reperfusion therapy is not contingent on any imaging study when the ECG shows clear ST-elevation and the clinical presentation is consistent with STEMI 1, 2