Are junctional rhythm regular?

As a medical professional with expertise in cardiology, I can provide you with an accurate answer to your question regarding junctional rhythms. **Junctional rhythms are typically regular, but they can sometimes be irregular.** The term "junctional rhythm" refers to a type of heart rhythm that originates from the atrioventricular (AV) junction, which is the area between the atria and ventricles of the heart. This rhythm is also known as nodal rhythm. Normally, the heart's pacemaker is the sinoatrial (SA) node, which is located in the right atrium. However, if the SA node is not functioning properly or is suppressed, the AV junction can take over as the pacemaker. The rate of a junctional rhythm is usually between 40 and 60 beats per minute, which is slower than the normal resting heart rate. When the rhythm is initiated by the AV junction, it tends to be regular because the electrical impulses are originating from a single site. However, there are situations where the rhythm can be irregular, such as when there is interference from other electrical signals or when the heart is experiencing certain conditions that affect its regularity. In summary, while junctional rhythms are generally regular, they can also be irregular depending on various factors affecting the heart's electrical activity.

The combination of atrial fibrillation with a regular rhythm (��regularised AF��) indicates that none of the atrial impulses are conducted to the ventricles, i.e. complete heart block is present. The narrow complex rhythm is therefore a junctional escape rhythm.