Navigation Links
Patients With Pacemakers Should Avoid MRI Scans

Study examines potential for injury when doctors decide benefits of imaging outweigh the risks

TUESDAY, Dec. 15 (HealthDay News) -- MRI scans can pose a serious risk to people with heart pacemakers, researchers warn.

U.S. Food and Drug Administration researchers exposed pacemakers to a simulated MRI magnetic field and then measured the electrical voltage produced at the tip of the pacemaker lead, where it would touch the interior of the patient's heart.

The exposure to MRI magnetic pulses caused certain pacemakers to deliver a drastically altered pulse and stimulate the heart inappropriately, which could have serious consequences for a patient, the study authors reported in the Dec. 14 edition of BioMedical Engineering OnLine.

"MRI systems emit several types of extremely intense magnetic fields and have caused injury to patients due to interactions with pacemakers," study author Howard Bassen said in a news release from the journal's publisher. "Cardiologists who choose to scan patients with cardiac pacemakers must assess the risks versus the benefits of the scan. This paper identifies one more risk."

About 40 million MRI scans are performed annually in the United States, where 10 million people have pacemakers.

Pacemaker and MRI manufacturers instruct physicians not to expose patients with pacemakers to MRI scans, which can disrupt a pacemaker's electronic system and burn heart tissue at the tip of the pacemaker lead.

But, despite these instructions, some cardiologists have developed special protocols that describe how to perform MRI scans on patients with pacemakers. Their belief is that the diagnostic benefits of MRI outweigh the pacemaker malfunction risks.

More information

The American Heart Association outlines devices that may interfere with pacemakers.

-- Robert Preidt

SOURCE: BioMed Central, news release, Dec. 14, 2009

Copyright©2009 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Fluctuating eye pressure associated with visual field deterioration in glaucoma patients
2. Comparison of obstetric outcomes between on-call and patients own obstetricians
3. Vision restoration therapy shown to improve brain activity in brain injured patients
4. Diabetes appears to increase risk of death for patients with acute coronary syndromes
5. Ambulatory oxygen rarely a benefit in COPD patients without resting hypoxemia
6. Restricting Blood Flow May Help Heart Bypass Patients
7. Patients with Medicaid and those lacking insurance have higher risk of advanced laryngeal cancer
8. Study provides hope that some transplant patients could live free of antirejection drugs
9. Study provides hope that some transplant patients could live free of anti-rejection drugs
10. Longer ambulance journeys boost death risk for seriously ill patients
11. Expenses Overshadow Optimism for Kidney Failure Patients
Post Your Comments:
(Date:11/25/2015)... ... ... In an ongoing Clinical Study conducted by an independent physician, Andrew Gostine, ... evaluating the efficacy of its product and its disinfection protocol. This study is taking ... 2014 through October 2015 at a 360-bed, acute-care, academic medical center located in Chicago, ...
(Date:11/25/2015)... Silver Spring, Md (PRWEB) , ... November 25, ... ... the Pulmonary Hypertension Association (PHA) announces the nation’s Periwinkle Pioneers, individuals and groups ... the history of this disease. The Periwinkle Pioneers, nominated by the public, will ...
(Date:11/25/2015)... ... November 25, 2015 , ... Many people know of the ... gain, cold hands, and dry skin. But many people who find their cholesterol levels ... regimen instead of their thyroid, especially if they don’t have any of the other ...
(Date:11/25/2015)... ... November 25, 2015 , ... Bunion Bootie , ... early celebration of the early holiday shopping season. Starting Wednesday November 25th, Bunion ... ea). Black Friday promotional pricing is in addition to any automatic discounts applied ...
(Date:11/24/2015)... ... , ... New patients who wish to seek treatment for missing teeth can ... her Mississauga, ON practice. Dr. Williams has been providing dental service for over 34 ... Missing teeth can lead to a variety of complications if they are not replaced ...
Breaking Medicine News(10 mins):
(Date:11/24/2015)... November 25, 2015 The hope ... repeated failure of IVF cycles. After failure of over ... and had lost all hopes that she would be able to conceive ever. ... child conceived after failure of over 15 IVF cycles. ... before they decided to take one last attempt with Gaudium IVF ...
(Date:11/24/2015)... 2015  Thanks to a donor with a personal ... Center,s Sister Diane Grassilli Center for Women,s Health now ... San Francisco . Fred ... with a gift of $617,320 that allowed the Center ... Tomosynthesis and Whole Breast Ultrasound. Tomosynthesis, three-dimensional (3-D) mammography ...
(Date:11/24/2015)... Colo. , Nov. 24, 2015  Array ... that its Chief Executive Officer, Ron Squarer ... Healthcare Conference in New York.  The public is ... webcast on the Array BioPharma website.Event:Piper Jaffray Annual ... , Wednesday, December 2, 2015Time:1:30 p.m. Eastern Time ...
Breaking Medicine Technology: