心肌梗死发作时,典型症状是胸骨后疼痛,呈压榨性、闷胀性或窒息性。然而临床发现,很多中老年“心梗”患者这种心前区疼痛症状不明显,而以牙痛为首发症状。这是因为,心脏上广泛分布着交感神经和副交感神经,这些神经同人体各部位之间存在着比较复杂的联系。当心肌某个部位发生梗死时,这个部位的植物神经受到刺激,会放射到躯体其他的部位,引起那些部位的疼痛,这就叫“放射痛”。比如,下壁心 Myocardial infarction attack, the typical symptoms of sternal pain, was squeezing, suffocating or asphyxia. However, clinical findings, many elderly patients with “myocardial infarction” such symptoms of anterior area pain is not obvious, but with toothache as the first symptom. This is because the heart is widely distributed sympathetic and parasympathetic, these nerves and various parts of the body there is a more complicated relationship. When an infarction occurs in a certain part of the myocardium, the autonomic nerve in this area is stimulated and emits to other parts of the body, causing pain in those parts. This is called “radiating pain.” For example, the next heart