Heart palpitations after eating? You’re not alone. These brief episodes of heart racing, pounding, or fluttering can happen ...

First, the sinoatrial, or SA, node sets your “resting” heart rate, usually somewhere between 60 and 100 beats per minute.

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 ...

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.

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 ...