For the record – the Holter monitor is named after Dr. Norman Holter, who created this device and won accolades during the 1950S. It is a type of heart monitor that records your heart’s activity ranging from 24 to 48 hours. If you experience an irregular heartbeat or any kind of health palpitations, all you need is a cardiac monitor to diagnose the problem. You can actually wear the Holter monitor while performing daily activities. But, our expert doctors suggest that if you need urgent treatment for heart symptoms, then a Holter monitor might not be the best option.