病因与发病机理的探讨房性心律失常:房性心律失常多见于器质性心脏病,如风湿性心脏病、心肌病、冠心病及先天性心脏病等,引起心房扩大和纤维化,从而为心房扑动或颤动准备了发病条件。其它情况例如酒精中毒、甲亢、肺炎、心包炎或肿瘤侵犯心包等,多能产生心房折返,而引起心房扑动或颤动。较高浓度 Etiology and pathogenesis of atrial arrhythmia: Atrial arrhythmia more common in organic heart disease, such as rheumatic heart disease, cardiomyopathy, coronary heart disease and congenital heart disease, causing atrial expansion and fibrosis, which is Atrial flutter or fibrillation prepared for the onset of conditions. Other cases such as alcoholism, hyperthyroidism, pneumonia, pericarditis or tumor invasion pericardium, etc., can produce atrial reentry, causing atrial flutter or fibrillation. Higher concentration