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老年人病态窦房结综合征(SSS)并不少见,表现较复杂,严重者多预后较差。有人认为在60岁以上的老年人中患SSS者占一半以上。窦房结内起搏细胞(P细胞)数量与年龄呈反比关系。因此,窦房结固有的频率随增龄而下降。有人指出,40岁以后窦房结肌细胞明显缺乏,而结内弹力纤维和胶元纤维的数量逐渐增加。Davies(1972)通过对窦房结肌细胞的定量分析,证实窦房结内肌细胞随增龄有明显减少,并指出心脏传导系统衰老的表现除窦房结内起搏细胞数目减少外,尚有心房、心肌内纤维组织及脂
Senile sick sinus syndrome (SSS) is not uncommon, the performance is more complex, severe prognosis is poor. Some people think that more than half of SSS in the elderly over the age of 60. The number of pacemaker cells (P cells) in sinoatrial node is inversely proportional to the age. Therefore, the inherent frequency of sinus node decreased with age. It was pointed out that after 40 years of age significantly lack of sinoatrial cells, and the number of elastic fibers and collagen fibers in the knot gradually increased. Davies (1972) by quantitative analysis of sino-atrial myocytes, confirmed that sinoatrial cells with significantly reduced age, and pointed out that the performance of the heart conduction system in addition to the number of sinus node in the pacemaker cells decreased Atrial, myocardial fibrosis and fat