login
Become a member
Quick Registration
Full Registration Benefits -
Free Homepages for Doctors
Free Homepages for Hospitals
Free Homepages for Medical Conference
Free Homepages for NGO's
Personal Health Record Creation
Access to all Medical Slides
Access to all Jobs & Products Sale
Why Heart Attacks, Stroke Often Occur During Early Morning Hours Explained
According to Dr Ibhar Al Mheid, a postdoctoral cardiology researcher at Emory, endothelial cells serve as the interface between the blood and the arteries, controlling arterial tone and helping to prevent clots that lead to strokes and heart attacks.
The researchers sought to determine the circadian pattern of both endothelial function -- the ability of blood vessels to relax -- and the abundance of the progenitor cells.
"One of the important ways the lining of our blood vessels is maintained is by progenitor cells that come from the bone marrow," said Al Mheid.
"These are essentially stem cells that help replace endothelial cells at sites of injury and build new vessels at sites deprived of adequate blood supply," Al Mheid added.
During the study, the researchers examined the a dozen healthy middle-aged subjects every four hours for 24 hours.
Blood vessel relaxation was assessed by cuff occlusion, a standard technique in measuring blood pressure.
The researchers measured the ability of subjects' blood vessels to relax, the abundance of endothelial progenitor cells (EPCs) and their ability to grow in culture.
They found that both the ability of blood vessels to relax and EPCs' ability to grow peaked at midnight, while endothelial function was weak in early morning.
"The lining of our vessels appears to function better at night than in the day. Endothelial function is particularly depressed in the early morning hours," said Al Mheid.
The study was presented at the American Heart Association Scientific Sessions in New Orleans.
Source-ANI
SPH
|
|
More News on: Bells Palsy, Diet Lifestyle and Heart Disease, Mitral Valve Stenosis And Mitral Valve Replacement, Congenital Heart Disease, Stress and the Gender Divide, Stroke Facts, Stroke, Heart, Geriatry-Related Diseases, Heart Attack- Lifestyle Risks
 Comment & Contribute
|
Medwonders Health Network
- Health News Index
 | Quiz on Heart A quiz on heart to learn more about its functions. 
|
- News Quick Links
 |
Heart
Complete Medindia Resources
|
| News Categories: |
| » | Scientists See Potential in New Leukemia Treatment |
| » | Cardio-Pulmonary Function can be a Strong Indicator for Survival Chances of Breast Cancer Patients |
| » | Post Surgery Will the Tumour Return? New Breast Cancer Test to Predict Exactly |
| » | Scientists Develop Compound That Triggers Cancer Cell Death |
| » | Iraqi National Hopes to Find Affordable Treatment for His Cancer in India |
| More Cancer News | |
|
