Objective To investigate the clinical value of using electrocardiographic scatter diagrams in the diagnosis of arrhythmias using long-duration ambulatory electrocardiography. Methods The 24-hour ECG data obtained from the ambulatory ECG recorder were plotted into ECG scatter diagrams by computer

and the results of the diagnosis by scatter diagrams and conventional analysis methods were recorded and their diagnostic compliance rates were calculated

and the differences of B-line slope in various arrhythmia scatter diagrams were analyzed. Results The B-line slope was lower in the ventricular premature group

atrial fibrillation group

differential conduction group

and supraventricular premature beat group（p<0.05）

and the difference was higher in the supraventricular premature beat group（p <0.05）. There was no significant difference between atrial fibrillation group and differential conduction group（p >0.05）. Conclusions ECG scattergram can be used to diagnose arrhythmias quickly

easily and accurately in the massive ECG data interpretation of long-duration dynamic ECG.