Irregular HEART RATE caused by abnormal function of the SINOATRIAL NODE. It is characterized by a greater than 10% change between the maximum and the minimum sinus cycle length or 120 milliseconds.

Synonyms: Arrhythmias, Sinus, Sinoatrial Arrhythmias, Arrhythmia, Sinus, Sinoatrial Arrhythmia, Arrhythmia, Sinoatrial, Arrhythmias, Sinoatrial, Sinus Arrhythmias, Sinus Arrhythmia