Bigeminy
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Bigeminy is a heart arrhythmia in which heart beats occur in pairs with a pause between each pair. A typical example is ventricular bigeminy which is a normal beat followed by a premature ventricular beat, also known as a premature ventricular contraction (PVC). Following the PVC there is a pause and then the normal beat returns - only to be followed by another PVC. The continuation of this pairing of beats is an example of bigeminy.