The difference between complete and incomplete right bundle branch conduction block is mainly the difference in V1 lead performance on the electrocardiogram. Complete right bundle branch block has a QRS time limit t≥0.12s in the V1 lead on the ECG, while incomplete right bundle branch block has a QRS time limit t<0.12s.
Right bundle branch block is a partial or total interruption of impulse conduction in the bundle branches, and conduction block can be caused by many cardiac pathologies, including both physiologic cardiac degeneration and pathologic diseases such as acute infarction and pulmonary embolism. Complete versus incomplete right bundle branch block is most often diagnosed by electrocardiographic differential diagnosis, but there is no specific treatment after diagnosis.
Complete versus incomplete right bundle branch block is seen in people without organic heart disease and has a favorable prognosis when present alone. When combined with other organic heart disease, the prognosis is related to the extent of damage and ventricular function.
If a patient develops complete or incomplete right bundle branch block, it is recommended to go to a regular hospital to avoid misdiagnosis.