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Effect of Right Bundle Branch Block on Electrocardiographic Amplitudes, Including Combined Voltage Criteria Used for the Detection of Left Ventricular Hypertrophy

Background: Although right bundle branch block (RBBB) delays right ventricular depolarization, its effect on cancellation of right and left ventricular forces within the QRS complex has not been quantified during stable temporal and physiological conditions. Systematic changes in QRS amplitude during transient RBBB bear directly on performance of standard ECG criteria for left ventricular hypertrophy (LVH), and these changes require quantification.