Featured Research

from universities, journals, and other organizations

Caution urged in reducing blood pressure in patients with diabetes, coronary disease

Date:
March 15, 2010
Source:
University of Florida
Summary:
Systolic blood pressure levels between 130 and 140 appear to be the most healthful for patients with both diabetes and coronary artery disease, according to new findings.

For patients with diabetes and heart disease, less isn't always more -- at least when it comes to blood pressure.

New data show an increased risk of heart attack, stroke or death for patients having blood pressure deemed too high -- or too low, according to Rhonda Cooper-DeHoff, Pharm.D., an associate professor of pharmacy and medicine at UF. She reported her findings at the American College of Cardiology's 59th annual scientific session in Atlanta.

She recommends raising the systolic bar above 120 for blood pressure in patients with diabetes and coronary artery disease, saying that levels between 130 and 140 appear to be the most healthful.

Based on hypertension treatment guidelines, health-care practitioners have assumed that with regard to blood pressure, "the lower, the better," Cooper-DeHoff said. But, The International Verapamil SR-Trandolapril study, known as INVEST, suggests that the range considered normal for healthy Americans may actually be risky for those with a combined diagnosis of diabetes and coronary artery disease.

"Our data suggest that in patients with both diabetes and coronary artery disease, there is a blood pressure threshold below which cardiovascular risk increases," Cooper-DeHoff said.

As many as two out of three adults with diabetes have high blood pressure. Normal blood pressure as defined by the American Heart Association is less than 120 systolic and less than 80 diastolic. Blood pressure greater than 140 is still associated with a nearly 50 percent increase in cardiovascular risk in patients with diabetes. But efforts to reduce systolic blood pressure to below 130 did not appear to offer any additional benefit to diabetics with coronary artery disease compared with reduction of systolic blood pressure to between 130 and less than 140.

Cooper-DeHoff's study reveals for the first time that this group of patients also had a similar increase in risk when their blood pressure was controlled to lower than 115 systolic -- the range recommended as normal by the American Heart Association.

Stephan Brietzke, M.D., an endocrinologist who did not participate in the research, was intrigued by the findings, saying that they parallel recent studies looking at blood sugar control, which suggest a U-shaped curve with higher cardiovascular risks at both "too high" and "too low" extremes.

Brietzke, an associate professor of clinical medicine at the University of Missouri-Columbia since 2002, led a multidisciplinary team that developed Veterans Health Administration and Department of Defense collaborative guidelines for the treatment of type 2 diabetes. He sees this as an important study for doctors treating patients with diabetes and cardiovascular disease.

"Identifying thresholds of when to initiate treatment, and when to say 'good enough,' is extremely important not only to optimize patient outcomes, but also to help reduce unnecessary costs of care," Brietzke said.

The AHA reports that heart disease or stroke is the top cause of death for people with diabetes, affecting more than 60 percent of patients. High blood pressure, common in diabetes, doubles the risk of cardiovascular disease.

The INVEST study is the first to evaluate the effects of blood pressure-lowering in diabetic patients diagnosed with coronary artery disease. Researchers analyzed data collected from 6,400 patients from fall 1997 to spring 2003. The patients, who were 50 or older, were recruited from more than 850 sites in 14 countries. The researchers further consulted the national death index for U.S.-enrolled patients for an additional five years to compare death rates of patients based on their blood pressure category ranging from tightly controlled to non-controlled hypertension.

Abbott Laboratories provided funding for INVEST. Cooper-DeHoff also received support from a National Institutes of Health career development award.


Story Source:

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


Cite This Page:

University of Florida. "Caution urged in reducing blood pressure in patients with diabetes, coronary disease." ScienceDaily. ScienceDaily, 15 March 2010. <www.sciencedaily.com/releases/2010/03/100314091133.htm>.
University of Florida. (2010, March 15). Caution urged in reducing blood pressure in patients with diabetes, coronary disease. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2010/03/100314091133.htm
University of Florida. "Caution urged in reducing blood pressure in patients with diabetes, coronary disease." ScienceDaily. www.sciencedaily.com/releases/2010/03/100314091133.htm (accessed October 20, 2014).

Share This



More Health & Medicine News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Microneedle Patch Promises Painless Pricks

Microneedle Patch Promises Painless Pricks

Reuters - Innovations Video Online (Oct. 18, 2014) Researchers at The National University of Singapore have invented a new microneedle patch that could offer a faster and less painful delivery of drugs such as insulin and painkillers. Video provided by Reuters
Powered by NewsLook.com
Raw: Nurse Nina Pham Arrives in Maryland

Raw: Nurse Nina Pham Arrives in Maryland

AP (Oct. 17, 2014) The first nurse to be diagnosed with Ebola at a Dallas hospital walked down the stairs of an executive jet into an ambulance at an airport in Frederick, Maryland, on Thursday. Pham will be treated at the National Institutes of Health. (Oct. 16) Video provided by AP
Powered by NewsLook.com
Raw: Cruise Ship Returns to US Over Ebola Fears

Raw: Cruise Ship Returns to US Over Ebola Fears

AP (Oct. 17, 2014) A Caribbean cruise ship carrying a Dallas health care worker who is being monitored for signs of the Ebola virus is heading back to Texas, US, after being refused permission to dock in Cozumel, Mexico. (Oct. 17) Video provided by AP
Powered by NewsLook.com
Spanish Govt: Four Suspected Ebola Cases in Spain Test Negative

Spanish Govt: Four Suspected Ebola Cases in Spain Test Negative

AFP (Oct. 17, 2014) All four suspected Ebola cases admitted to hospitals in Spain on Thursday have tested negative for the deadly virus in a first round of tests, the government said Friday. Duration: 00:55 Video provided by AFP
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:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

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