Featured Research

from universities, journals, and other organizations

Previous stroke, vascular disease: Seniors at higher risk of stroke after heart surgery

Date:
July 21, 2014
Source:
Canadian Medical Association Journal
Summary:
Older people who have had strokes or who have vascular disease are at risk of stroke both immediately after cardiac surgery and during the following two years, according to a new study. Postoperative stroke is a significant complication after surgery. Many patients also have health conditions such as high blood pressure, diabetes and atrial fibrillation (irregular heartbeat) that can increase the long-term risk of stroke.

Older people who have had strokes or who have vascular disease are at risk of stroke both immediately after cardiac surgery and during the following two years, according to a new study in CMAJ (Canadian Medical Association Journal).

Postoperative stroke is a significant complication after surgery. Many patients also have health conditions such as high blood pressure, diabetes and atrial fibrillation (irregular heartbeat) that can increase the long-term risk of stroke.

A large study of 108,711 patients who had cardiac surgery in Ontario, Canada, sought to identify risk factors for long-term stroke after surgery to improve outcomes for patients. Researchers found several risk factors for stroke, both in the immediate postoperative period and up to two years after, including previous stroke, peripheral vascular disease (narrowing or obstruction of arteries), valve surgery and age 65 years or older. Patients who have atrial fibrillation after surgery are at risk of stroke in the postoperative period. The role of early anticoagulation therapy should be explored in future research.

"Our study adds more than 100,000 patients to [the] literature, with 18,046 (18.2%) who had postoperative atrial fibrillation, in whom there was a strong signal that this arrhythmia is associated with an increased risk of early stroke," writes Dr. Richard Whitlock, Population Health Research Institute, McMaster University, Hamilton, Ontario, with coauthors.

As well, patients who score higher on the CHADS2 score, a rule used by physicians to determine a patient's risk of stroke, are at increased risk of stroke with or without atrial fibrillation.

"The rate of stroke or death in the absence of any atrial fibrillation was 5.8% among patients with a CHADS2 score of 0 or 1, as compared with 14.8% among those with a higher score. In the group of patients who had a history of atrial fibrillation, the rate of stroke or death at 2 years was 9.3% among those with a CHADS2 score of 0 or 1, as compared with 19.9% among those with a higher score," write the authors.

This large study contributes to the understanding of longer-term stroke risks in cardiac surgery patients.


Story Source:

The above story is based on materials provided by Canadian Medical Association Journal. Note: Materials may be edited for content and length.


Journal Reference:

  1. R. Whitlock, J. S. Healey, S. J. Connolly, J. Wang, M. R. Danter, J. V. Tu, R. Novick, S. Fremes, K. Teoh, V. Khera, S. Yusuf. Predictors of early and late stroke following cardiac surgery. Canadian Medical Association Journal, 2014; DOI: 10.1503/cmaj.131214

Cite This Page:

Canadian Medical Association Journal. "Previous stroke, vascular disease: Seniors at higher risk of stroke after heart surgery." ScienceDaily. ScienceDaily, 21 July 2014. <www.sciencedaily.com/releases/2014/07/140721123821.htm>.
Canadian Medical Association Journal. (2014, July 21). Previous stroke, vascular disease: Seniors at higher risk of stroke after heart surgery. ScienceDaily. Retrieved September 20, 2014 from www.sciencedaily.com/releases/2014/07/140721123821.htm
Canadian Medical Association Journal. "Previous stroke, vascular disease: Seniors at higher risk of stroke after heart surgery." ScienceDaily. www.sciencedaily.com/releases/2014/07/140721123821.htm (accessed September 20, 2014).

Share This



More Health & Medicine News

Saturday, September 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Could Grief Affect The Immune Systems Of Senior Citizens?

Could Grief Affect The Immune Systems Of Senior Citizens?

Newsy (Sep. 19, 2014) The study found elderly people are much more likely to become susceptible to infection than younger adults going though a similar situation. Video provided by Newsy
Powered by NewsLook.com
Jury Delivers Verdict in Salmonella Trial

Jury Delivers Verdict in Salmonella Trial

AP (Sep. 19, 2014) A federal jury has convicted three people in connection with an outbreak of salmonella poisoning five years ago that sickened hundreds of people and was linked to a number of deaths. (Sept. 19) Video provided by AP
Powered by NewsLook.com
How The 'Angelina Jolie Effect' Increased Cancer Screenings

How The 'Angelina Jolie Effect' Increased Cancer Screenings

Newsy (Sep. 19, 2014) Angelina's Jolie's decision to undergo a preventative mastectomy in 2013 inspired many women to seek early screenings for the disease. Video provided by Newsy
Powered by NewsLook.com
The Cost of Ebola

The Cost of Ebola

Reuters - Business Video Online (Sep. 18, 2014) As Sierra Leone prepares for a three-day "lockdown" in its latest bid to stem the spread of Ebola, Ciara Lee looks at the financial implications of fighting the largest ever outbreak of the disease. Video provided by Reuters
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