What is the correct sequence for the path of myocardial electrical activity?

The correct sequence for the path of myocardial electrical activity is from the sinoatrial (SA) node to the atrioventricular (AV) node, followed by the Bundle of His, then the left bundle branch (LBB) and right bundle branch (RBB), and finally to the Purkinje fibers.

This pathway is essential for the heart's electrical conduction system, which propagates the impulse responsible for coordinating heartbeats. The SA node acts as the natural pacemaker, generating electrical impulses that spread through the atria, causing them to contract and move blood into the ventricles. The impulse then reaches the AV node, which serves as a gatekeeper, momentarily delaying the impulse before it travels into the Bundle of His—this delay allows time for the ventricles to fill with blood.

From the Bundle of His, the impulse divides into the right and left bundle branches, spreading through the respective pathways to the Purkinje fibers. This last network of fibers facilitates the rapid distribution of the electrical impulse throughout the ventricles, ensuring they contract efficiently and synchronously.

This sequence is crucial for proper cardiac function, as any disruption in the pathway can lead to arrhythmias or ineffective pumping of blood throughout the body. Understanding this