Criteria for right bundle branch block based on three-dimensional vectorcardiography. Possibilities of differential diagnostics

Relevance. Right bundle branch block (RBBB) has characteristic manifestations on an ECG, however, in clinical practice, when combined with another pathology – myocardial infarction, arrhythmogenic right ventricular dysplasia, combined damage to the conduction system, etc. difficulties may arise in interpretation. The purpose of the study. Development of RBBB criteria based on three-dimensional vector analysis with an assessment of the rate of formation of a spatial vector loop. Material and methods. The main group included 64 patients with BPH, including 42 men and 22 women, with an average age of 31.1±9.62 (M±σ) years. Patients with complete and incomplete RBBB were identified according to the accepted ECG criteria. The control group included 80 healthy patients with an average age of 31.5±6.3 (M±σ) years, 54 of them women and 26 men. Synchronous recording of 12 standard leads was performed in all patients, followed by reconstruction of a three-dimensional ECG using the EasyECG Rest ATES Medica software (Russia). The results of the study and conclusions. The criteria of RBBB based on three-dimensional ECG with an analysis of the spatial vector loop tracing rate have been determined, which remain effective in combination with left anterior fascicular block, and also allow for differential diagnosis with myocardial infarction, with epsilon wave in arrhythmogenic right ventricular dysplasia and other diseases of the cardiovascular system.