Navigation Links
An elephant tail

Use of the amino acid supplement L-arginine following a heart attack does not improve certain cardiac functions and measurements and may be associated with an increased risk of death, according to a study in the January 4 issue of JAMA.

L-arginine is a widely available dietary supplement and is publicized as having benefits for patients with hypertension, angina, heart failure and sexual dysfunction, according to background information in the article. Prior studies suggest that L-arginine has the potential to reduce vascular (blood vessel) stiffness.

Steven P. Schulman, M.D., of Johns Hopkins Medical Institutions, Baltimore, and colleagues conducted the Vascular Interaction with Age in Myocardial Infarction (VINTAGE MI) clinical trial to test whether administering L-arginine to patients following a first ST-segment elevation myocardial infarction (STEMI; a certain pattern on an electrocardiogram following a heart attack) over a 6-month period would decrease vascular stiffness and improve ejection fraction (a measure of how much blood the left ventricle of the heart pumps out with each contraction).

The randomized, double-blind, placebo-controlled trial included 153 STEMI patients; 77 were 60 years or older. Participants were enrolled from February 2002 to June 2004. Patients were randomly assigned to receive L-arginine (goal dose of 3 g three times a day) or matching placebo for six months.

The researchers found: "The VINTAGE MI study demonstrated that 6 months of L-arginine added to standard postinfarct medications did not reduce noninvasive measures of vascular stiffness, improve ejection fraction, or improve clinical outcomes. To the contrary, we noted a possible increased risk of death in older patients after infarction while taking L-arginine compared with those taking a placebo, leading to the early termination of the study. These findings have broad public health implications given the increasing availability and use of L-argin ine in patients with and without established cardiovascular diseases."

Death occurred in 6 patients (8.6 percent) in the L-arginine group died during the 6-month study period vs. none in the placebo group.

"In conclusion, L-arginine therapy should not be given to patients following a myocardial infarction. It neither alters noninvasive measures of vascular stiffness nor improves left ventricular function. L-arginine therapy in older patients with diffuse atherosclerosis may worsen clinical outcomes," the authors write.


Source:University of Utah

Related biology news :

1. Scientists journey to southern Africa to unravel the secret world of elephant communication
2. Key to elephant conservation is in the sauce
3. Vietnam war technology could aid elephant conservation
4. Male elephants woo females with precise chemistry
5. Genetic analysis of Asian elephants in India reveals some surprises
6. WWF peeks into mysterious life of Borneos pygmy elephants
7. New study of the worlds smallest elephant
8. Drunken elephants: The marula fruit myth
9. Widespread elephant slaughter discovered in Chad
10. Serengeti patrols cut poaching of buffalo, elephants, rhinos
11. Grabbing addiction by the tail
Post Your Comments:

(Date:5/24/2016)... , May 24, 2016 Ampronix facilitates superior patient care by providing ...  3D medical LCD display is the latest premium product recently added to the range ... ... ... Sony 3d Imaging- LCD Medical Display- Ampronix News ...
(Date:5/9/2016)... -- Elevay is currently known as the ... high net worth professionals seeking travel for work   ... there is still no substitute for a face-to-face meeting. ... deal with a firm handshake. This is why wealthy ... citizenship via investment programs like those offered by the ...
(Date:4/26/2016)... LONDON , April 26, 2016 ... a product subsidiary of Infosys (NYSE: ... to integrate the Onegini mobile security platform with ... ) The integration will ... to access and transact across channels. Using this ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... June 27, 2016   Ginkgo Bioworks , a ... engineering, was today awarded as one of the ... the world,s most innovative companies. Ginkgo Bioworks is ... the real world in the nutrition, health and ... directly with customers including Fortune 500 companies to ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... Researchers at ... most commonly-identified miRNAs in people with peritoneal or pleural mesothelioma. Their findings are the ... read it now. , Diagnostic biomarkers are signposts in the blood, lung fluid ...
(Date:6/23/2016)... , June 23, 2016 /PRNewswire/ - FACIT has ... Ontario biotechnology company, Propellon Therapeutics Inc. ... and commercialization of a portfolio of first-in-class WDR5 ... targets such as WDR5 represent an exciting class ... in precision medicine for cancer patients. Substantial advances ...
(Date:6/23/2016)... SANTA MONICA, Calif. , June 23, 2016  The Prostate Cancer ... to pioneer increasingly precise treatments and faster cures for prostate cancer. Members of ... 77 institutions across 15 countries. Read More About the ... ... ...
Breaking Biology Technology: