患者男 ,6 2岁。平素身体健康 ,无高血压、心绞痛病史。在无明显诱因的情况下 ,患者突然感觉左下牙剧烈的“牙痛” ,立即到医院口腔科检查 ,牙齿和牙龈都无异常发现 ,“牙痛”持续约 3ｍｉｎ后自行缓解 ,相隔约 2 5ｍｉｎ后 ,患者再次出现剧烈“牙痛” ,又到口腔科检查仍未发现 Patient male, 6 2 years old. Normal physical health, no high blood pressure, history of angina. In the absence of obvious incentive, the patient suddenly felt the severe left toothache “toothache” and immediately went to the hospital for stomatology examination. No abnormalities were found in the teeth and gums. The toothache relieved about 3 minutes later. After about 25 minutes, Patients again severe “toothache”, but also to the stomatological examination has not been found