Navigation Links
New Computerized Scans Effective for Spotting Clogged Arteries
Date:11/5/2007

They could eliminate need for invasive procedures for some patients, study says

MONDAY, Nov. 5 (HealthDay News) -- The new generation of cardiac scanners is almost as reliable as more invasive procedures when checking for blockages in the heart and surrounding arteries, researchers are reporting.

The new, 64-slice CT scans, introduced in the United States in 2005, won't eliminate the need for examining arteries through the more invasive process known as cardiac catheterization, also known as coronary angiography. But the scans will help cardiologists more quickly determine which patients can skip cardiac catheterization. As many as 25 percent of the 1.3 million cardiac catheterizations done each year in the United States may not be necessary, the researchers said.

The study results also showed that early detection with 64-CT is a good predictor of who will need angioplasty or coronary bypass surgery to open up new blood supply routes to the heart.

The findings, based on an international trial led by researchers at Johns Hopkins University, were presented Monday at the American Heart Association's annual meeting, in Orlando, Fla.

"This study is the first step to realizing the full potential of CT imaging in predicting coronary artery disease, and these scans complement the arsenal of diagnostic tests available to physicians to prevent heart attacks," said Hopkins cardiologist Dr. Julie Miller, who led the study at the university.

The study results found that, on average, 91 percent of patients with blockages were detected with 64-CT scans, and the scans were able to diagnose 83 percent of patients without blockages. This level of accuracy, the researchers said, should allow cardiologists to accurately identify patients who need angioplasty or bypass surgery. More than 250,000 Americans undergo coronary bypass surgery each year.

For the study, the researchers chose 291 men and women over the age of 40 who were scheduled to have cardiac catheterization to check for blocked arteries. Each underwent a 64-CT scan prior to catheterization. The patients were then monitored through regular check-ups to identify who developed or did not develop coronary artery disease and who required bypass surgery and who did not.

After the first year of monitoring, the researchers found that results from 64-CT scans matched up 90 percent of the time with results from invasive catheterization in detecting patients with blockages. The researchers also found that 64-CT scans were 83 percent to 90 percent accurate, while tests using older, 16-CT scans were in some cases only 20 percent to 30 percent as precise. The trial is to continue until 2009.

In cardiac catheterization, a thin tube is inserted into a blood vessel in the groin area to the heart's arteries, where a dye is injected to produce a clear X-ray image of the beating heart and its arterial blood supply. In CT imaging, computer-driven machinery passes X-rays through the body, producing digitized signals or "slices" that are detected and reconstructed for a precise picture.

The new study also suggests that the new scanners, four times faster than the more widely used 16-CT scans, may be a good alternative to cardiac stress testing, which evaluates heart function by measuring the effects of hard exercising. Exercise stress testing typically can't be done on the weak and elderly.

"Use of 64-CT scans will dramatically improve our ability to detect and treat people with suspected coronary disease and chest pain much earlier in their disease," said Hopkins cardiologist Dr. Joao Lima, senior investigator with the study. "Cardiac catheterization is still the gold standard for evaluating clogged arteries, but our results show that this test could easily be the best backup or alternative."

Blocked arteries are the most frequent cause of heart attack, Lima said. The latest estimates from the American Heart Association show that one in five deaths in the United States each year is due to coronary heart disease.

More information

For more on cardiac catheterization, visit the American Heart Association.



SOURCE: Johns Hopkins University School of Medicine, news release, Nov. 5, 2007


'/>"/>
Copyright©2007 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Computerized Jump Rope Raises Funds for Breast Cancer Research
2. Computerized training of working memory is a promising therapeutic strategy in ADHD
3. European directive will halt use of MRI scans; cancer diagnosis and treatment will suffer
4. PET scans can accurately detect a breast tumors response to chemotherapy
5. High-tech CT scans: not a bad choice to test for clogged arteries
6. New treatment effective in counteracting cocaine-induced symptoms
7. Use of certain lipid measures not more effective in predicting coronary heart disease
8. HPV vaccine does not appear to be effective for treating pre-existing HPV infection
9. Effectiveness of mouse breeds that mimic Alzheimers disease symptoms questioned
10. Stanford study highlights cost-effective method of lowering heart disease risks
11. Jefferson specialists studying innovative surgery for effectively treating sleep apnea
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New Computerized Scans Effective for Spotting Clogged Arteries
(Date:3/28/2017)... Monica, CA (PRWEB) , ... March 28, 2017 ... ... Dr. Carson Liu of SkyLex Advanced Surgical, Inc. is thrilled to offer the ... gastric balloon procedure, and this procedure adds to SkyLex Advanced Surgical’s already ...
(Date:3/28/2017)... ... , ... With expansion and efficiency in mind, Patten Seed Company completed relocation ... plant opened in Marshallville in 2006, and a bagging and shipping facility has been ... of Patten Seed operations to the Middle Georgia location from their previous home in ...
(Date:3/28/2017)... ... ... Thank you to all who attended Capio Partners Winter 2017 Healthcare Leadership ... to providers and offered an opportunity to collaborate and network with healthcare colleagues across ... where attendees gathered for a lively discussion on trends and issues that healthcare leaders ...
(Date:3/28/2017)... ... ... Bacteria and fungi are probably not the first ingredients that come to mind when thinking ... in your diet can actually improve health outcomes. And the good news is they may ... a new peer-reviewed paper led by Maria Marco, Ph.D. , University of ...
(Date:3/27/2017)... ... March 27, 2017 , ... Drs. Bruce Trimble ... without requiring a referral. Trimble Dental offers a variety of services to ... dental implants. Whether patients have discolored, crooked or missing teeth in Eau Claire, ...
Breaking Medicine News(10 mins):
(Date:3/28/2017)... , March 28, 2017 ... expected to reach a value of USD 4.5 billion ... View Research, Inc. Proper closure of injured tissues post ... and function. Postoperative leakages occur in 3% to 15% ... They are responsible for one third of postoperative deaths ...
(Date:3/27/2017)... , March 27, 2017 ... to better understand Bayer and its partnering interests and activities ... 2010 report provides an in-depth insight into the partnering activity ... On demand company reports are prepared upon purchase to ... company data. The report will be delivered in ...
(Date:3/27/2017)... 2017  Cryoport, Inc. (NASDAQ: CYRX, CYRXW) ("Cryoport" or ... shares of common stock in an underwritten public offering ... the Securities and Exchange Commission (the "SEC"). The offering ... can be no assurance as to whether or when ... actual size or terms of the offering. Cryoport also ...
Breaking Medicine Technology: