Abnormally slow heart rates result from breakdowns in two principal areas of the heart. First, the sinoatrial, or SA, node sets your “resting” heart rate, usually somewhere between 60 and 100 beats ...

A healthy heart has an initial action impulse generated in the sinoatrial node and carried through the heart's upper chambers or atria. The impulse then moves down the internodal atrial pathways ...

There are several key areas that conduct electrical signals through the heart – the sinoatrial node, atrioventricular node, and bundle branches all work like players in an orchestra to keep a ...

Researchers discovered that gene deserts, non-coding DNA regions, regulate heart and embryo development through enhancer ...

More testing revealed that, in addition to a rapid heart rate, she had sick sinus syndrome, a condition in which the heart's sinoatrial node is damaged and can't produce normal heartbeats.

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 ...

Typically, the signal for your heartbeat starts in the right atrium in the sinoatrial node and travels to both the left and right ventricles, allowing your heart to coordinate its rhythm in your ...