This test is used to check your heart’s rhythms. It is a continuous recording of a person’s EKG for 24 hours. The patient will have EKG electrodes attached to their chest, which are attached to a small tape recorder that can be hung around the patient’s neck or slung over the shoulder, or attached to their belt. Since the patient will go about their normal daily activities (except for anything in which water would touch the monitor), it allows the physician to correlate any symptoms of palpitations, dizziness or black outs, which will help determine any abnormalities or heart conditions. Holter monitoring can be more effective in detecting abnormal heart rhythms than EKGs since it is performed over a longer period of time.