Arrhythmia is a pathological condition in which the heart rate, rhythm and sequence of heart contractions are impaired. This is the general name for pathology, it is characterized by any deviation from the normal state of the heart. Often, patients are unaware of an illness developing. Symptoms of arrhythmia are similar to other pathologies or simply factors that provoke similar conditions. For example, headaches are often attributed to stress. Chest pain syndrome is referred to as exercise.