Paired occurrences, such as heart rhythms.
A double heartbeat, in which a normal beat is coupled with an abnormal beat. Bigeminy is typically experienced as a missed beat or flip-flop in the chest. Occasional bigeminy is harmless, but repeated episodes can be a sign of a heart rhythm problem.
The condition in which alternate ectopic beats of the heart are transmitted to the pulse and felt as a double pulse beat {pulsus bigeminus). It is a common manifestation of digitalis poisoning.