The regular arrhythmia occurring at the beginning of the electrocardiogram was identified as ventricular bigeminy. Single ventricular premature complexes (VPCs), as well as pairs and triplets of ...

There are four main characteristics of PACs: Premature, occurring earlier than expected if measured against previous P-P intervals. Ectopic, originating outside of the SA node, and thus ...

A premature ... They are ectopic. Meaning originating outside of the SA node. Thus the P wave morphology would be different than the normal sinus P wave. They are narrow complexes.