pararrhythmia

A cardiac dysrhythmia in which two independent rhythms coexist, but not as a result of A-V block; p. thus includes parasystole and A-V dissociation (2), but not complete A-V block. [para- + G. rhythmos, rhythm]

* * *

par·ar·rhyth·mia (par″ə-rithґme-ə) parasystole.