Let her know if you feel pain at that point. If you do, you will receive more medication. Part of the x-ray machine that guides the electrophysiologist, will be placed directly over your body. After the catheters are in place, the electrophysiologist will evaluate your heart rhythm by giving your heart small electrical impulses to make it beat at different speeds. You may feel your heartbeat changing or your heart racing from time to time.
Some people faint when their hearts beat fast.
If this occurs, the electrophysiologist may give you some medication, or she may deliver an electrical impulse called a countershock to change your heart rhythm back to normal. When the procedure is complete, the electrophysiologist will remove the catheters from your groin and apply pressure to the area for 5 to 10 minutes to prevent bleeding. Then a dressing will be applied to the area. An EPS usually takes 2 to 4 hours. After the procedure, your blood pressure, heart rate and maybe catheter insertion sites will be checked at regular intervals.