A team of people will work together to assist in the procedure and assure your safety. Besides the electrophysiologist (EP doctor), there will be specially trained healthcare technicians and nurses to assist the EP and to monitor your condition. EP studies are carried out in a specially equipped lab that resembles an operating room. The same precautions for maintaining a sterile environment will be followed. The EP lab features a lot of equipment — including a type of x-ray system called fluoroscopy. The EP will watch a screen to follow the catheter as it is advanced through your blood vessel and into your heart.
You will lie flat on the surgical table, covered with surgical drapes, except for the area where the catheter will be inserted. You will have an IV in your arm to deliver medications as needed. You will be given a local anesthetic at the point where the catheter will be inserted. There will be a small amount of bleeding at the site, but it will be controlled and there is no danger to you. EP studies are usually done with “conscious sedation” — that is, you will be given medication to relax you, but you will not be put under general anesthesia. Your doctor will talk to you ahead of time about the level of anesthesia planned for you. You will be awake, but you must remain still during the procedure. Some patients fall asleep, while others watch the monitors and ask questions.
The electrophysiologist will move the catheter around to measure electricity at different sites in your heart. He or she may administer medications or electrical impulses to aid in evaluating your heart’s rhythm. Patients seldom complain of pain, although you may have a somewhat unpleasant sensation in your chest. The EP study usually takes 1-2 hours. If other procedures are done immediately, your time in the EP lab will be longer — up to 6 hours in some cases.