When suspecting UA/NSTEMI, a chest x-ray is critical to aid in the exclusion of aortic dissection.  A mediastinal mass seen on x-ray may be consistent with both aortic dissection and cancer, however cancer is unlikely to present with a syndrome of accelerating chest pain.  Chest x ray is also used to evaluate other causes of chest pain or discomfort such as pneumonia, pneumothorax, and pulmonary hypertension.
Unstable angina / non ST elevation myocardial infarction chest x-ray
Unstable angina / non ST elevation myocardial infarction physical examination
ST elevation myocardial infarction chest x ray
Unstable angina / non ST elevation myocardial infarction echocardiogram
Chronic stable angina chest x-ray
Right ventricular myocardial infarction electrocardiogram
Stress cardiomyopathy chest x ray
Unstable angina / non ST elevation myocardial infarction electrocardiogram