Navigation Links
Visually guided laser may be viable treatment for abnormal heartbeat
Date:5/25/2010

A new treatment known as a visually-guided laser-balloon catheter successfully interrupted abnormal electrical pulses in patients and pigs with intermittent, irregular heartbeats, in a study reported in Circulation: Arrhythmia and Electrophysiology, a journal of the American Heart Association.

Severe cases of irregular heartbeat may require a procedure called ablation, which destroys a group of "misfiring" cells to stop abnormal electrical impulses that cause erratic heartbeats.

Investigators aimed at cells in the pulmonary veins that carry blood from the lungs to the heart. In the clinical part of the study, they ablated the misfiring cells with 100 percent accuracy. In 84 percent of the pulmonary veins treated, electrical pulses ceased after just one set of laser treatments. Three months after treatment, 90 percent of the treated veins remained inactive.

Unlike other catheters that rely on X-rays for visual guidance, in the new treatment doctors use a slender instrument called an endoscope that provides continuous real-time images. This allows investigators to aim the laser at precise locations in the pulmonary veins. The investigators destroyed cells in an overlapping pattern to completely "disconnect" them and prevent new electrical connections from forming later.

The study's clinical component included 27 patients, average age 53, two-thirds male, with diagnosed intermittent, abnormal heartbeat (called paroxysmal atrial fibrillation, or PAF). All patients had tried at least one drug that did not relieve their symptoms.

For the animal model, the scientists examined pigs because their hearts are structured similar to humans. The investigators inactivated abnormally functioning pulmonary veins 97 percent of the time after the first set of laser-energy treatments. Four weeks later, 80 percent of the ablated veins were still inactive.

Additional research is needed to determine long-term safety and efficacy of balloon-guided, laser catheter, researchers said.

Author disclosures are on the manuscript. CardioFocus, Inc., funded the study.


'/>"/>

Contact: Maggie Francis
maggie.francis@heart.org
214-706-1382
American Heart Association
Source:Eurekalert

Related medicine news :

1. Lighthouse International Introduces a New, Customizable, Low-Vision Simulator That Shows How the World Looks to People Who Are Visually Impaired
2. LaundryView(R) Makes Doing Laundry More Convenient for the Visually Impaired
3. X-ray guided steroid injections effectively treat hamstring tendonitis, study suggests
4. Guided Meditation Made Available to Everyone for Stress Awareness Month
5. Office-based ultrasound-guided FNA superior in diagnosing head and neck lesions
6. Guided Care participants rate quality of health care high
7. NEI Guided Nutrition Program(TM) is Second Entrant in Medical Arsenal for Neuro-Endocrine-Immune Supersystem(C) Product and Testing Protocols
8. Dilon Diagnostics Gamma-Guided Localization System Cleared by FDA
9. Dilon Diagnostics Gamma-Guided Localization System Cleared by FDA
10. Antibody-guided drug shows encouraging activity in metastatic breast cancer
11. Simulated training for ultrasound-guided procedures improves safety without risk to patients
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/6/2016)... Birmingham, AL (PRWEB) , ... May 06, 2016 ... ... the commencement of a master charity program created to support and assist the ... every 60 days, working closely with nonprofit organizations and community leaders. Their desire ...
(Date:5/6/2016)... ... ... Mother’s Day is mixed with worry and fear for new mothers those whose babies are ... first time ever, the March of Dimes and Random Acts of Flowers ... crib surrounded by lifesaving equipment or peering through a glass window at a baby they ...
(Date:5/6/2016)... , ... May 06, 2016 , ... US Sports Camps ... rugby camp held at Oregon State University this summer. Employing world-class rugby figures, including ... of all skill levels with training on key fundamentals, match play, fitness and more. ...
(Date:5/6/2016)... ... May 06, 2016 , ... Bluvault ( Bluvault ... service offering for global clients of Coupa ( Coupa Software ) and other ... Service is a key component in the suite of innovative implementation services offered ...
(Date:5/6/2016)... ... May 06, 2016 , ... Fat-Freezing, which ... around the body, is the most popular among body sculpting options, according to ... sense to cosmetic surgeon Dr. Richard Buckley, medical director of MilfordMD Cosmetic Dermatology ...
Breaking Medicine News(10 mins):
(Date:5/5/2016)... , May 5, 2016 Endo International plc ... appointment of Douglas S. Ingram , former president of ... Todd B. Sisitsky , managing partner of TPG Capital, ... "Endo recently embarked ... complement, enhance and expand the Board,s capabilities. Doug and Todd ...
(Date:5/5/2016)... , May 5, 2016 Progra m ... trial of Oxitec , s mosquito ... Aedes aegypti by 96 %   ... a new plan to fight wild Aedes aegypti, the dangerous mosquito ... on the island of Grand Cayman .  MRCU, a global ...
(Date:5/5/2016)... -- Research and Markets has announced the addition ... USA"  report to their offering.  ,     (Logo: http://photos.prnewswire.com/prnh/20160330/349511LOGO ... Positron Emission Tomography (PET) scanner and cyclotron install base ... with the current known number of PET scanners and ... report also contains a detailed breakdown of this equipment ...
Breaking Medicine Technology: