Why is a holter monitor used?

There are some people who gave an irregular heart rate or may complain of palpitations. The ECG in these patients is often unrevealing. In order to detect abnormal heart rhythms, a holter monitor is used. The holter is able to detect abnormal rhythms that may occur for a few seconds or minutes. A holter monitor is often used to record heart rhythms in patients suspected of having paroxysmal atrial fibrillation or hypertrophic cardiomyopathy.