Abstract：At the occurrence of second degree(or higher) atrioventricular block in the atrioventricular junctional area, RR long interval which appears intermittently or continuously was usually eliminated by nodal escape or nodal escape rhythm. It is actually a kind of self-protection mechanism of human beings. The appearance of nodal escape or nodal escape rhythm complicates the ECG of second degree atrioventricular block which is originally relatively complex while 24-hour ambulatory electrocardiography includes all possible combinations of various long and short cycles. However, ECG scatterplot in analysis software clearly manifests two significant electrophysiological characteristics of nodal escape and nodal escape rhythm from different angles, that is, escape cycle is relatively fixed and escape rhythm readjusts at any time. This paper summarizes three scatterplot features of escape rhythm and its analysis method, based on explanation of practical cases. Characteristic ECG scatterplot makes it possible to recognize nodal escape and nodal escape rhythm quickly and accurately.
2015, Vol. 24 
