BACKGROUND AND PURPOSE Unenhanced time-resolved spin-labeled magnetic resonance angiography enables hemodynamic quantification in arteriovenous malformations (AVMs). Our purpose was to identify quantitative parameters that discriminate among different AVM components and to relate hemodynamic patterns with rupture risk. METHODS Sixteen patients presenting with AVMs (7 women, 9 men; mean age 37...

This study analyzed the rupture risk of intracranial aneurysms (IAs) according to aneurysm characteristics by comparing the differences between two aneurysms in different locations within the same patient. We utilized this self-controlled model to exclude potential interference from all demographic factors to study the risk factors related to IA rupture. A total of 103 patients were diagnosed w...

BACKGROUND Few previous hemodynamic studies demonstrated the detailed features of rupture point of intracranial aneurysms. The hemodynamic simulation for the case that ruptured during angiography was even rare. In the present study, we studied the hemodynamic characteristics of a posterior communicating artery segment aneurysm that ruptured during angiography and detailed the hemodynamic featur...

BACKGROUND AND PURPOSE The natural history of unruptured intracranial aneurysms remains unclear, and management strategy is not well defined. METHODS From January 2003 to December 2012, we enrolled patients with aneurysm in our institution. In total, 2252 patients with 2897 aneurysms were eligible for analysis, and 1960 eligible aneurysms were conservatively managed. Precise 3-dimensional eva...

The tympanic membrane can rupture due to many causes (Table 1). The most common cause of rupture is assault over the ear squarely with the hand. This occurs frequently as a sequel to domestic violence. No study has been done to evaluate the nature or extent of the problem in this country. The purpose of this study was to assess the population characteristics of the victims of assault, their ass...

Two types of heat treatments are commonly used for alloy 901, one to optimize resistance to creep and rupture and the other, to improve tensile and fatigue properties. Solution and aging-treatment parameters (temperature, time, quench) for both types of heat treatment were varied within the ranges permitted by common specifications to define heat treatments resulting in improved combinations of...

background: a precise understanding of the mechanism of human neointimal stenoses and atherosclerotic fibrous plaques , which give rise to thromboses in vital arteries, requires a suitable animal model that would mimic the same characteristics well. we developed a rabbit model of neointimal stenosis and fibrotic plaque rupture in the carotid artery to visualize the lesion progress and to charac...

introduction left ventricular free wall rupture (lvfwr) is a frequent cause of death after acute myocardial infarction, and its repair remains a surgical challenge. conclusions a hemodynamic study was acceptable at a 12-month follow-up, and no complication was seen. case presentation tachosil® is a ready-to-use equine collagen patch which has been successfully used for hemostasis in cardiovascu...