Abstract：Objective To analyze the ambulatory electrocardiographic characteristics of atrial fibrillation(AF) with slow ventricular rate and to explore its mechanism. Methods Slow ventricular rate referred to the average ventricular rate＜60 times/min and the fastest ventricular rate＜90 times/min. Combining with clinical data, retrospective analysis was performed on ambulatory electrocardiography(AECG) of 27 AF patients with slow ventricular rate. The frequency and distribution state of long RR interval(＞2.0 s) was studied. Results The total ventricular rate was 61,877-80,520 times during 24 hours. The 24hour average ventricular rate of 51-59 times was found in 19 cases and 43-49 times was found in 8 cases. Long RR interval(＞2.0 s) occurred for 6,808 times[1,994 times(29.28%) in the daytime and 4,814 times(70.72%) at night]. There were 11 cases(44%) with long RR interval occurring in the daytime while 14 cases(56%) with long RR interval occurring at night. Conclusion Besides basic pathological changes, degenerative change of conduction system is also an important factor of AF with slow ventricular rate. Analysis on long RR interval and the time point of its occurrence also provides evidences of degradation and functional incapacitation of atrioventricular conduction function during AF, which should be clinically attached great attention to.
王冬, 杨新, 贾邢倩. 慢室率心房颤动的动态心电图特征及发生机制的探讨[J]. 实用心电学杂志, 2017, 26(2): 116-118.
WANG Dong, YANG Xin, JIA Xing-Qian. The ambulatory electrocardiographic characteristics and mechanism of atrial fibrillation with slow ventricular rate. JOURNAL OF PRACTICAL ELECTROCARDIOLOGY, 2017, 26(2): 116-118.
2017, Vol. 26 
