Bigeminy is a type of cardiac arrhythmia in which abnormal heart beats occur every other concurrent beat.  The abnormal heart beat can originate from the atrium, AV node or the ventricle. A typical example is<unk>  resulting from premature ventricular contractions/complexes (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.  Other forms of abnormal beats include PAC, escape beats and parasystole.
Bigeminal rhythm
Gallop rhythm
Persistent juvenile T-wave pattern
Nocturnal myoclonus
Epsilon wave
Sine wave pattern
Precordial thump
Absence seizure