The most likely diagnosis is acute myocardial infarction. 可能性最大的诊断是急性心肌梗死。
A patient who had an acute myocardial infarction complains of severe substernal pain.Which of the following nursing interventions would be most appropriate? 一名患有急性心肌梗死的病人，主诉严重的胸骨下疼痛，以下哪一项护理措施最恰当？
