What does a Couplet on an ECG refer to?

A couplet on an ECG refers to two premature ventricular contractions (PVCs) that occur in succession. This term comes from the definition of a couplet, which in a broader context denotes a pair of items that are grouped together. In the context of heart rhythm, when two PVCs happen back-to-back, they represent an abnormality in the heart's electrical conduction system, often seen in various cardiac conditions.

Understanding PVCs is crucial since they can indicate underlying heart disease, electrolyte imbalances, or increased sympathetic activity. Recognizing a couplet can help healthcare professionals assess the patient's cardiac stability and determine if further evaluation or intervention is needed.