What is a typical heart rate for electrical conduction through the right bundle branch?

The typical heart rate associated with electrical conduction through the right bundle branch is characterized by its role as a part of the heart's conduction system, which includes the atrioventricular (AV) node and the bundle branches. When the right bundle branch is functioning independently, it often operates at a slower inherent pacing rate.

In cases where there is a complete heart block, where the electrical signal cannot pass from the atria to the ventricles effectively, the right bundle branch can take over conduction. This typically happens in a secondary pacemaker capacity, allowing the heart to maintain a minimum rhythm. The rate of 20 to 40 beats per minute reflects this scenario, indicating that while the right bundle branch can facilitate conduction, it usually does so at a significantly reduced rate, lower than the typical sinus node firing rate.

Higher heart rate ranges, such as those listed in the other options, are not typical for the functioning of the right bundle branch itself but instead represent either atrial or ventricular pacing mechanisms, which operate at faster intrinsic rates. Thus, while the right bundle branch can provide a backup rhythm, its primary role is not to maintain a higher standard heart rate.