Atrial Fibrillation: Imaging Technique That Minimizes Radiation Exposure Should be Widely Used

An imaging technique to treat atrial fibrillation that reduces radiation exposure can be more widely used.

Imaging technique to treat irregular heartbeat that limits or eliminate patients' exposure to radiation should be more widely adopted by physicians, NewYork-Presbyterian and Weill Cornell Medicine cardiologists.

The new review article in Heart Rhythm, posts the primary obstacle to the procedure’s widespread use. This could be physician’s discomfort with a different visual tool that can be overcomed with training and experience.

Could Coronary Artery Calcium Scan Be Useful In Screening Heart Disease?
A simple CT imaging technique called a coronary artery calcium scan may be particularly useful when screening for coronary artery disease.

‘Imaging technique for atrial fibrillation procedure that reduces radiation exposure should be more widely used.’

Atrial fibrillation (AF) is a condition that affects as many as 6.1 million Americans and is characterized by an irregular, often rapid heart rate caused by a misfiring of electrical impulses.

Physicians commonly treat the condition using a minimally invasive procedure called catheter ablation, in which doctors insert thin, flexible wires into veins, snaking them up into the heart.

Once there, physicians apply radiofrequency energy or freezing temperatures to eliminate the abnormal electrical pathways, restoring the heart's regular rhythm.

Increased Exposure to Radiation Ups the Risk of Health Problems for Medical Staff
Health care workers are at a greater risk of radiation exposure related health problems, but if proper protective measures are followed, this can be prevented.

To guide this procedure, many cardiologists rely on an imaging technique called fluoroscopy that uses a continuous X-ray beam to visualize the heart. While effective, the technique exposes both the care team and patient to high doses of radiation.

"The amount of fluoroscopy received by a patient during a routine AF ablation procedure is estimated to be the equivalent of the dose of radiation a patient would receive with 830 X-rays," said lead author Dr. Bruce Lerman, chief of the Division of Cardiology and director of the Cardiac Electrophysiology Laboratory at NewYork-Presbyterian/Weill Cornell Medical Center and Weill Cornell Medicine, where he is also the H. Altschul Master Professor of Medicine.

New MRI Method to Track Creatine May Spot Heart Problems Earlier
A new MRI method to map creatine at higher resolutions in the heart may help clinicians find abnormalities and disorders earlier than traditional diagnostic methods.

"In our hands, the vast majority of AF patients do not require fluoroscopy, resulting in no radiation exposure to the patient or the electrophysiologist performing the procedure."

To accomplish fluoroless catheter ablation, the NewYork-Presbyterian and Weill Cornell Medicine team use technology that emits high-frequency sound waves, known as intracardiac echocardiography (ICE), to create a complete and precise image of the heart.

In addition, the use of computerized three-dimensional mapping systems and pre-procedural cardiac imaging can further guide the procedure. Weill Cornell Medicine electrophysiologists believe that physicians around the country can embrace fluoroless ablation of atrial fibrillation by challenging entrenched practices.

"Although the concept of fluoroless catheter ablation was introduced several years ago, it has yet to gain wide adoption, mostly because many electrophysiologists were trained to rely on X-ray imaging and are reluctant to trust ICE," said co-author Dr. Jim Cheung, director of clinical electrophysiology research and cardiac electrophysiology fellowship training at NewYork-Presbyterian/Weill Cornell Medical Center and associate professor of medicine at Weill Cornell Medicine. Dr. Cheung is a consultant for and has received fellowship grant support from Biosense Webster, a manufacturer of electrophysiology devices.

"This concern can be remedied with experience. For some, the learning curve can be steep, but generally, the skill set can be readily acquired. By thoughtfully modifying the way the procedure is performed, we can significantly reduce the radiation risk in the process."

"We are currently training our fellows to utilize this technique in an effort to guide the next generation of cardiologists to become well-versed in fluoroless ablation," Dr. Cheung said.

"The most critical requisite for performing fluoroless catheter ablation of AF is a willingness to relinquish an old habit," said Dr. Lerman, who is also a consultant for Biosense Webster. "Doing so will have a tremendous advantage for both patients and healthcare professionals."

Source-Eurekalert