老年病,顾名思义,就是老年期特有的疾病或者多发的疾病,主要包括三类:其一,中年期可发病,但是老年人其患病率明显增高的慢性疾病,如高血压、动脉硬化、冠心病、Ⅱ型糖尿病、脑梗死、脑出血、慢性支气管炎、肺气肿、肺源性心脏病、肿瘤等;其二,为老年人所特有,如钙化性心脏瓣膜病、老年期痴呆、老年 Alzheimer’s disease, as the name implies, is a perennial disease or a multiple disease. It mainly includes three types: First, chronic diseases in which middle-aged people can develop but whose prevalence is significantly higher in the elderly such as hypertension, arteriosclerosis, Coronary heart disease, type II diabetes mellitus, cerebral infarction, cerebral hemorrhage, chronic bronchitis, emphysema, pulmonary heart disease, cancer, etc .; secondly, peculiar to the elderly, such as calcific valvular heart disease, senile dementia, elderly