Featured Research

from universities, journals, and other organizations

New Hope For Heart Failure Patients: Cardiac Resynchronization

Date:
September 1, 2009
Source:
University of Rochester Medical Center
Summary:
Patients who had a cardiac resynchronization device combined with a defibrillator implanted had a 34 percent reduction in their risk of death or heart failure when compared to patients receiving only an implanted cardiac defibrillator, according to a landmark study.

Patients who had a cardiac resynchronization device combined with a defibrillator (CRT-D) implanted had a 34 percent reduction in their risk of death or heart failure when compared to patients receiving only an implanted cardiac defibrillator (ICD), according to a landmark study published online in the New England Journal of Medicine and presented today at the European Society of Cardiology Congress (ESC) in Barcelona, Spain.

The overall benefit observed from resynchronization therapy was driven by a 41 percent reduction in heart failure. Women who received CRT-D had an "astonishing" 63 percent reduction in their risk of heart failure.

About one million cardiac patients in the United States die each year from either electrical, heart rhythm disorders that result in sudden cardiac death or from mechanical disorders where the heart's pumping ability is impaired (heart failure), according to the study authors.

In 2002, Arthur Moss, M.D., professor of Medicine at the University of Rochester Medical Center, and the MADIT (Multicenter Automatic Defibrillator Implantation Trial) research group showed that an implanted defibrillator, or ICD, reduced the risk of death by 31 percent in cardiac patients as part of the MADIT-II trial. This therapy was soon approved by the U.S. Food and Drug Administration and became part of professional guidelines from the American Heart Association, the American College of Cardiology and the Heart Rhythm Society. Long-term follow-up studies showed, however, that ICDs were so effective at preventing sudden death that patients lived longer and were subsequently at increased risk for heart failure. This created an urgent need to better address both risks in tandem.

Cardiac resynchronization therapy (CRT) is currently approved for treatment only for patients with symptoms of severe heart failure (New York Heart Association [NYHA] class III and IV) in whom it reduces symptoms by improving the mechanical pumping action of the heart. Moss, also principal investigator of the current MADIT-CRT trial, and his team designed MADIT-CRT as follow-up to MADIT-II. The new trial sought to determine if preventive CRT-D therapy, the combination of an ICD with CRT, could reduce the risk of mortality and heart failure in patients with mild cardiac disease and few symptoms (NYHA class I or II).

Over a 4 year period, 1820 patients from 110 medical centers in the United States, Canada, and Europe were enrolled and followed in MADIT-CRT. The trial was sponsored by Boston Scientific Corp. through a research grant to the University of Rochester. It is the world's largest randomized study involving NYHA class I and II patients. About 70 percent of the approximately 5.5 million Americans with some form of heart disease, or 3.9 million people, fall into NYHA class I or II.

"The findings from MADIT-CRT show that CRT-D effectively reduces the risk of heart failure," Moss said. "There is a very large population of patients with heart disease whom we believe will benefit from CRT-D therapy."

Prior to 2009, Moss received honoraria from Boston Scientific for talks at scientific programs. He holds no stock in any device company, has never been a member of any corporate speakers' bureau, and since Dec. 1, 2008, has chosen not to accept honoraria from Boston Scientific for any professional activity.

"This is a very important trial," said Richard Page, M.D., president of the Heart Rhythm Society. "Previous studies have shown that the ICD saves lives. This trial demonstrates that in this population, an ICD with biventricular pacing can be expected also to improve clinical outcome as measured by hospitalization for heart failure. I anticipate that these results may improve acceptance of ICD therapy, both by patients and their physicians, in that the patient would not only live longer, but also would live better."


Story Source:

The above story is based on materials provided by University of Rochester Medical Center. Note: Materials may be edited for content and length.


Cite This Page:

University of Rochester Medical Center. "New Hope For Heart Failure Patients: Cardiac Resynchronization." ScienceDaily. ScienceDaily, 1 September 2009. <www.sciencedaily.com/releases/2009/09/090901082412.htm>.
University of Rochester Medical Center. (2009, September 1). New Hope For Heart Failure Patients: Cardiac Resynchronization. ScienceDaily. Retrieved July 23, 2014 from www.sciencedaily.com/releases/2009/09/090901082412.htm
University of Rochester Medical Center. "New Hope For Heart Failure Patients: Cardiac Resynchronization." ScienceDaily. www.sciencedaily.com/releases/2009/09/090901082412.htm (accessed July 23, 2014).

Share This




More Health & Medicine News

Wednesday, July 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Courts Conflicted Over Healthcare Law

Courts Conflicted Over Healthcare Law

AP (July 22, 2014) Two federal appeals courts issued conflicting rulings Tuesday on the legality of the federally-run healthcare exchange that operates in 36 states. (July 22) Video provided by AP
Powered by NewsLook.com
Why Do People Believe We Only Use 10 Percent Of Our Brains?

Why Do People Believe We Only Use 10 Percent Of Our Brains?

Newsy (July 22, 2014) The new sci-fi thriller "Lucy" is making people question whether we really use all our brainpower. But, as scientists have insisted for years, we do. Video provided by Newsy
Powered by NewsLook.com
Scientists Find New Way To Make Human Platelets

Scientists Find New Way To Make Human Platelets

Newsy (July 22, 2014) Boston scientists have discovered a new way to create fully functioning human platelets using a bioreactor and human stem cells. Video provided by Newsy
Powered by NewsLook.com
Gilead's $1000-a-Pill Drug Could Cure Hep C in HIV-Positive People

Gilead's $1000-a-Pill Drug Could Cure Hep C in HIV-Positive People

TheStreet (July 21, 2014) New research shows Gilead Science's drug Sovaldi helps in curing hepatitis C in those who suffer from HIV. In a medical study, the combination of Gilead's Hep C drug with anti-viral drug Ribavirin cured 76% of HIV-positive patients suffering from the most common hepatitis C strain. Hepatitis C and related complications have been a top cause of death in HIV-positive patients. Typical medication used to treat the disease, including interferon proteins, tended to react badly with HIV drugs. However, Sovaldi's %1,000-a-pill price tag could limit the number of patients able to access the treatment. TheStreet's Keris Lahiff reports from New York. Video provided by TheStreet
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins