1) Cardiac arrhythmium 
Bigeminy (Latin: bi-two, gemini-twins) is a descriptor for a heart arrhythmia in which there is a continuous alternation of long and short heart beats. Most often this is due to ectopic heart beats occurring so frequently that there is one after each sinus beat, typically premature ventricular contractions (PVCs). For example, a sinus beat is shor...
Pairing; especially, the occurrence of heart beats in pairs. ... Synonym: bigemini. ... Origin: bi-+ L. Geminus, twin ... (05 Mar 2000) ... 
(bi-jem´ĭ-ne) occurrence in pairs; especially, the occurrence of two beats of the pulse or two heartbeats in rapid succession.
Type: Term Pronunciation: bī-jem′i-nē Definitions: 1. Pairing; especially, the occurrence of heart beats in pairs. Synonyms: bigemini
the occurrence of premature atrial or ventricular heartbeats in pairs.