Electrocardiographic signs of left bundle branch block and prediction of response to biventricular and conduction system pacing

The paper presents an analysis of Russian and foreign studies on left bundle branch block (LBBB) and the analysis of electrocardiographic (ECG) criteria for selecting patients for cardiac resynchronization therapy. The features of LBBB classification are considered, including true and false forms, as well as differences in conduction block location with a similar ECG performance. Particular attention is paid to the problem of variability of existing ECG criteria and the prognostic significance of individual ECG signs. The importance of developing new criteria for improving diagnostics and increasing the effectiveness of treatment of LBBB patients is emphasized to improve selection for biventricular and conduction system pacing.