Improved arrhythmia interpretation of Holter recordings with the use of derived 12 lead ECG

Holter monitoring has been extensively used for the detection, diagnosis and treatment of cardiac arrhythmias. With the advent of three channel recorders it is possible to obtain a derived 12 lead ECG by recording modified electrocardiographic leads X, Y and Z. The method was developed and recently described by Dower et al and consists of four electrodes (E, A, S, E) used to record the three leads (AS, AI, and ES) and to derive a 12 lead ECG. In the present study we report our findings on the analysis of arrhythmias detected on 24 hour Holter monitoring. The derived 12 lead ECG was helpful and superior to the 3 lead recording in the analysis, interpretation and diagnosis of supraventricular and ventricular arrhythmias, intraventricular conduction disturbances and ventricular repolarization abnormalities.