aortic

Mystery Blood Vessel Disorder Implicated In 'Mini' Strokes

...people with dolichoectasia are more likely to have aortic aneurysms, a potentially fatal weakening of the ma... French researchers who linked dolichoectasia with aortic aneurysm reveal new evidence that links the disorder with small vessel disease, a significant cause ...

Why do aneurysms form? New studies suggest leading role for white blood cells

...he deadly toll of this condition, called abdominal aortic aneurysm or AAA ("triple A"), experts know very li...cent of all men over the age of 70 may have intact aortic aneurysms, which cause few symptoms except for occasional back pain or abdominal discomfort. If they...

Researchers show how air pollution can cause heart disease

...nsmitters serotonin and acetylcholine affected the aortic arches of PM2.5-exposed mice differently than those of controls. The arteries taken from exposed mice were less elastic than the control group, constricting more in the presence of serotonin and relaxing less in response to acetylcholine. Once again,...

Bone and cartilage growth to blame for heart valve disease

... certain cells to reprogram into bone cells in the aortic valve and cartilage cells in the mitral valve, say...hool of Medicine, who examined diseased mitral and aortic valves removed during surgery for the study. "Common wisdom in the medical community has always bee...

Cincinnati surgeons report new treatment for often-fatal injury

...e method for repairing a common and deadly form of aortic injury--an advance that could help reduce the numb...ts who suffer this injury--known as blunt thoracic aortic trauma--die before ever reaching a hospital. The aorta is the main artery that carries oxygenated b...

New GI technologies improve internal organ visualization

...ide them, researchers punctured the myocardium and aortic valve or coronary artery in the six pigs; three re...hree received thermal ablation, or clearing of the aortic valve. The repeat puncture of the cardiac walls and injection of contrast to help visualize the tis...

Minorities, uninsured less likely to receive care at high-volume hospitals

...ase. The procedures included elective abdominal aortic aneurysm repair, coronary artery bypass grafting, carotid endarterectomy, esophageal cancer resection, hip fracture repair, lung cancer resection, cardiac valve replacement, coronary angioplasty, pancreatic cancer resection, and total knee replacemen...

How blood flow dictates gene expression

...sed on the high-flow side of developing mitral and aortic valves in the heart of a 14-day-old embryo. The researchers surmise that the mechanical stimulus of blood flowing in a vessel leads to the upregulation of Klf2, which either activates or represses genes that control smooth muscle tone, that is the...

Percutaneous aortic valve replacement safe, successful in high-risk patients

...y aiding in the replacement of narrowed, calcified aortic valves in patients too sick to withstand open-ches...) experienced improvements in both the size of the aortic valve and in the severity of heart failure. To evaluate the CoreValve system, Anita Asgar, M.D., a...

Human stem cell treatment restores motor function in paralyzed rats

...t of patients undergoing a surgical process called aortic cross-clamping. When the surgeon works on the aorta, a major blood vessel, to correct a potentially lethal aneurysm, blood flow from the heart must be temporarily blocked with a clamp. After 30 minutes, this lack of blood flow can result in the...

Cellular message movement captured on video

These time-lapse images of a bovine aortic endothelial cell reveal the motion toward the cell...h red and green fluorescence markers to the bovine aortic endothelial cells, grew them in tissue culture, and filmed them while they passed fluid across the c...