疾病是一个处于不断发展变化之中的病理过程。在诊断思维中要注意如下四个关系。一、现病史与过去史的相互关系。过去史与现病史往往有着直接的联系,为诊断提供重要的线索和依据。一例年轻的患者,短暂地意识丧失后出现偏瘫,起病较急,体检发现心前区舒张期隆隆样杂音及心房纤颤。若过去有风湿性心脏病 Disease is a pathological process that is constantly evolving. In the diagnostic thinking should pay attention to the following four relationships. First, the current history of the past and the relationship between history. Past history and current medical history often have a direct connection, providing important clues and basis for diagnosis. A young patient, after a brief loss of consciousness appear hemiplegia, acute onset, physical examination revealed pre-ventricular diastolic murmur and atrial fibrillation. If you have rheumatic heart disease in the past