They are alterations of the normal rhythm of the heart whether it is accelerated, slows down or becomes irregular. The normal heart rate is rhythmic and regular ranging from 60 to 100 beats per minute; below these values is called bradycardia and above this is known as tachycardia.
Arrhythmias can be originated from heart disorders (myocardial infarction, myocarditis, heart failure, etc.) or by external diseases (anemia, hyperthyroidism, etc.). The main symptoms are palpitations, dizziness, chest pain, presyncope (imminent feeling of fainting, without losing consciousness) or syncope (fainting). These symptoms may go completely unnoticed and be detected accidentally when performing tests for another reason.
With the event monitoring or event Holter, the heart rate can be monitored for longer periods, increasing the opportunity to demonstrate rhythm alterations or discard the presence of them, increasing the reliability of the result.
