Sinoatrial exit block occurs when the action potential initiated by the sinoatrial node is inhibited or completely blocked before it is able to leave the SA node and reach the atrium, and thus no ...

It is driven by the sinoatrial node, a cluster of pacemaker cells that spontaneously generate electrical impulses independently of the brain. As this intrinsic electrical system does not rely on ...

First, the sinoatrial, or SA, node sets your “resting” heart rate, usually somewhere between 60 and 100 beats per minute. This is the base effort needed to circulate enough blood to sustain ...

In humans, the heart’s sinoatrial node (SAN), acts as the body’s pacemaker. A new study, published Wednesday (July 26) in Science Translational Medicine, reports two backup mechanisms that may prevent ...

When the patient's heart was removed, a portion of the right atrium was left behind including the native sinoatrial node (SA node). A new heart was implanted which also included a SA node.

Ivabradine is a selective inhibitor of the I f ion channel found in cardiac pacemaker cells of the sinoatrial node. The drug reduces heart rate at rest and during exercise in patients in sinus ...

This Valentine’s Day, as we exchange stylised hearts in celebration of love, we might pause to remember that the power of the heart has been a symbol of life, death and everything in between for ...