An Sve beat refers to a beat originating from Supraventricular Ectopy (SVE), which encompasses premature atrial contractions (PACs) and runs of supraventricular tachycardia (SVT). These are extra or abnormal heartbeats that start above the ventricles (the lower chambers of the heart).
Here's a breakdown:
- Supraventricular: Meaning "above the ventricles." The electrical signal that triggers the heartbeat originates in the atria (the upper chambers of the heart) or the atrioventricular (AV) node, which sits between the atria and ventricles.
- Ectopy: Meaning "out of place" or "abnormal location." In this context, it signifies that the heartbeat is not starting from the sinoatrial (SA) node, which is the heart's natural pacemaker.
- Premature Atrial Contraction (PAC): An early heartbeat that originates in the atria. It often feels like a skipped beat.
- Supraventricular Tachycardia (SVT): A rapid heart rate (tachycardia) originating above the ventricles. It can be caused by various mechanisms, including re-entry circuits in the AV node or atria.
In many cases, infrequent SVE, like the occasional PAC, is considered benign, particularly if the individual has no symptoms. However, frequent or symptomatic SVE, such as SVT, may require medical evaluation and management.
