BACKGROUND AND PURPOSE The degree of internal carotid stenosis has emerged as the most important predictor of ischemic stroke in extracranial carotid artery disease. The purpose of this study was to assess the validity of the noninvasive techniques for quantifying internal carotid stenosis with respect to the accepted standard of intra-arterial angiography. METHODS We measured the maximum per...

Carotid artery stenosis is the narrowing of lumen (inner surface) carotid artery. Usually caused by atherosclerosis, which an atheromatose plaque due to inflammation consisting necrotics, fats and cholesterol crystals. Occlusion arterial lumens makes brain lack blood supply causing damage function. Sometimes, a long period can cause permanent vascular tissue in brain. Stenosis also poses danger...

conclusion we conclude that coronary calcium scoring provided useful information in the management of patients. in cacs less than 100, it has a npv of 87% in excluding significant stenosis in patients with the risk of cad but it does not have enough diagnostic accuracy for surely excluding coronary stenosis, so we should perform a combination of cacs and coronary ct angiography for patients. re...

Since obstruction to left ventricular (LV) outflow in hypertrophic obstructive cardiomyopathy (HOCM) is dynamic, whereas that in discrete aortic stenosis is fixed, the shape of the transaortic pressure gradient should be characteristically altered in HOCM and thereby provide a means of differentiating these two disparate types of aortic stenosis. In all 22 HOCM patients, peak arterial pulse alw...

BACKGROUND Intracranial vascular complications following radiosurgery are extremely rare. CASE DESCRIPTION We report a case of stenosis in the internal carotid artery 5 years after gamma knife radiosurgery for a recurrent pituitary adenoma. Percutaneous transluminal angioplasty was performed successfully with anatomical and functional improvement. CONCLUSION These results suggested the impo...

BACKGROUND AND PURPOSE Assessment of cerebral autoregulation has been traditionally performed with static changes in arterial blood pressure. Newer dynamic methods require the induction of sudden drops in arterial blood pressure with the sudden release of bilateral thigh cuffs. An alternative method is proposed, based on the spontaneous variability of arterial blood pressure that does not requi...