Featured Research

from universities, journals, and other organizations

Platelet function tests may provide only modest benefit in predicting cardiac outcomes

Date:
February 23, 2010
Source:
JAMA and Archives Journals
Summary:
An analysis of six tests that are used to measure platelet function and help gauge the effectiveness of antiplatelet drugs for patients undergoing a cardiac procedure such as a coronary stent implantation found that only three of the tests were associated with a modest ability to predict outcomes such as heart attack or death, according to a new study.

An analysis of six tests that are used to measure platelet function and help gauge the effectiveness of antiplatelet drugs for patients undergoing a cardiac procedure such as a coronary stent implantation found that only three of the tests were associated with a modest ability to predict outcomes such as heart attack or death, according to a study in the February 24 issue of JAMA.

Dual antiplatelet therapy with aspirin and clopidogrel (antiplatelet agent used to inhibit blood clots) reduces atherothrombotic (vascular obstruction) complications in patients undergoing percutaneous coronary intervention (PCI; procedures such as balloon angioplasty or stent placement used to open narrowed coronary arteries) with stenting. However, the individual response to dual antiplatelet therapy is not uniform, according to background information in the article. There currently is no consensus regarding the most appropriate method to quantify the magnitude of effect an antiplatelet agent may have on platelet reactivity.

Nicoline J. Breet, M.D., of St. Antonius Hospital and St. Antonius Center for Platelet Function Research, Nieuwegein, the Netherlands, and colleagues conducted a study to evaluate the ability of multiple platelet function tests to predict atherothrombotic events, including stent thrombosis (blood clot within the stent), in 1,069 clopidogrel-pretreated patients undergoing elective coronary stent implantation. Using blood samples, platelet reactivity was measured in parallel with six platelet function tests. The primary outcome measured was a composite of all-cause death, nonfatal heart attack, stent thrombosis and ischemic stroke.

The researchers found that at 1-year follow-up, the primary outcome occurred more frequently in patients with high platelet reactivity when assessed by the tests light transmittance aggregometry, VerifyNow and Plateletworks, which also had modest ability to discriminate between patients having and not having a primary event. The three other testing methods (IMPACT-R, Dade PFA collagen/ADP, and Innovance PFA P2Y) were unable to discriminate between patients with and without the primary outcome. None of the tests identified patients at risk for bleeding.

"In conclusion, of the platelet function tests assessed, only light transmittance aggregometry, VerifyNow, and Plateletworks were significantly associated with the primary end point. However, the predictability of these 3 tests was only modest. None of the tests provided accurate prognostic information to identify patients at higher risk of bleeding. Thus, [this study] does not support the use of platelet function testing to guide clinical practice in a low-risk population of patients undergoing elective PCI," the authors write.


Story Source:

The above story is based on materials provided by JAMA and Archives Journals. Note: Materials may be edited for content and length.


Journal Reference:

  1. Nicoline J. Breet; Jochem W. van Werkum; Heleen J. Bouman; Johannes C. Kelder; Henk J. T. Ruven; Egbert T. Bal; Vera H. Deneer; Ankie M. Harmsze; Jan A. S. van der Heyden; Benno J. W. M. Rensing; Maarten J. Suttorp; Christian M. Hackeng; Jurrien M. ten Berg. Comparison of Platelet Function Tests in Predicting Clinical Outcome in Patients Undergoing Coronary Stent Implantation. JAMA, 2010; 303 (8): 754-762 [link]

Cite This Page:

JAMA and Archives Journals. "Platelet function tests may provide only modest benefit in predicting cardiac outcomes." ScienceDaily. ScienceDaily, 23 February 2010. <www.sciencedaily.com/releases/2010/02/100223161825.htm>.
JAMA and Archives Journals. (2010, February 23). Platelet function tests may provide only modest benefit in predicting cardiac outcomes. ScienceDaily. Retrieved August 29, 2014 from www.sciencedaily.com/releases/2010/02/100223161825.htm
JAMA and Archives Journals. "Platelet function tests may provide only modest benefit in predicting cardiac outcomes." ScienceDaily. www.sciencedaily.com/releases/2010/02/100223161825.htm (accessed August 29, 2014).

Share This




More Health & Medicine News

Friday, August 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Killer Amoeba Found in Louisiana Water System

Killer Amoeba Found in Louisiana Water System

AP (Aug. 28, 2014) State health officials say testing has confirmed the presence of a killer amoeba in a water system serving three St. John the Baptist Parish towns. (Aug. 28) Video provided by AP
Powered by NewsLook.com
Who Could Be Burnt by WHO's E-Cigs Move?

Who Could Be Burnt by WHO's E-Cigs Move?

Reuters - Business Video Online (Aug. 28, 2014) The World Health Organisation has called for the regulation of electronic cigarettes as both tobacco and medical products. Ciara Lee looks at the impact of the move on the tobacco industry. Video provided by Reuters
Powered by NewsLook.com
CDC Director On Ebola Outbreak: 'It's Worse Than I Feared'

CDC Director On Ebola Outbreak: 'It's Worse Than I Feared'

Newsy (Aug. 28, 2014) CDC director Tom Frieden says the Ebola outbreak is even worse than he feared. But he also said there's still hope to contain it. Video provided by Newsy
Powered by NewsLook.com
How A 'Rule Of Thumb' Could Slow Down Drinking

How A 'Rule Of Thumb' Could Slow Down Drinking

Newsy (Aug. 28, 2014) A study suggests people who follow a "rule of thumb" when pouring wine dispense less than those who don't have a particular amount in mind. Video provided by Newsy
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