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Efficacy of cardiac magnetic resonance for the qualitative diagnosis of blunt cardiac injury

A 47‐year‐old man was admitted after a car collision in shock with cardiac tamponade. After his circulation was stabilized by pericardial drainage, we treated him conservatively. Abnormal laboratory data and initial electrocardiogram (ECG) were suggestive of myocardial injury. However, echocardiography and cardiac computed tomography could not reveal the cause of the tamponade or the site of cardiac injury. ECG‐gated cardiac magnetic resonance images were acquired.