<unk>  is a cardiac arrhythmia in which there is a single ectopic beat, or irregular heartbeat, following each regular heartbeat. Most often this is due to ectopic beats occurring so frequently that there is one after each sinus beat, or normal heartbeat. The two beats are figuratively similar to two twins (hence bi- + gemini). For example, in ventricular<unk> , a sinus beat is shortly followed by a premature ventricular contraction (PVC), a pause, another normal beat, and then another PVC. In atrial<unk> , the other "twin" is a premature atrial contraction (PAC).
Bigeminy
Gallop rhythm
Picardy sweat
Stuttering
Dichotic pitch
Atopy
Bendopnea
Growing Pains