Physiological Modification of Immediate Ischemia due to Experimental Middle Cerebral Occlusion— Its Relevance to Cerebral Infarction • In cats subjected to middle cerebral artery occlusion, the resulting ischemia was unaffected by the blood pressure at the time of occlusion when arterial PC02 was normal or low. At normal and elevated blood pressures, hypercapnia established prior to occlusion m...

Previous studies have shown that hypertension and left ventricular hypertrophy (HT-LVH) increase completed infarct size. Myocardial infarction progresses in a wavefront of myocardial necrosis from the subendocardium to the subepicardium. We tested two hypotheses: First, HT-LVH accelerates the wavefront of myocardial necrosis when compared with normotensive animals; and second, lowering of arter...

Central retinal vein occlusion in young people is a rare entity. Here we present two cases of central retinal vein occlusion in young women using oral contraceptive pills. We found no other systemic problems and all routine investigations were within normal limits. The cases were managed with further avoidance of oral contraceptives and intravitreal injections of Bevacizumab (Avastin) to reduce...

A set of images in which a pacemaker lead replacement procedure was complicated by occlusion of the proximal subclavian vein is presented. However, this was not detected on venography performed before the procedure. Physicians should be aware of a more proximal occlusion of the subclavian vein while replacing pacemaker leads, even in cases with seemingly normal venography.

Normal, marginal, and central ischemic regional myocardial function were evaluated in a canine model of myocardial infarction during 90 minute left circumflex coronary artery occlusion in 25 anesthetized dogs randomly assigned to intravenous ibuprofen infusion (n = 13,5.36 mg/kg/h beginning 1 hour before occlusion) or vehicle solution as control (n = 12) and in 15 conscious, unsedated dogs 48 a...

PURPOSE The authors used a monkey model to evaluate intraocular lenses (IOLs) for the treatment of infantile cataract in humans. Specifically, they sought to assess the effectiveness of IOLs, with and without occlusion therapy, in preventing amblyopia. METHODS A diffuser contact lens was placed on one eye each of 11 neonatal monkeys to simulate an infantile cataract. A unilateral lensectomy, ...

Previous studies have shown that infarct expansion occurs at least 1 day after a large transmural infarction. To assess whether regional left ventricular expansion is evident within hours of an acute myocardial infarction, 25 adult mongrel dogs underwent left circumflex coronary artery occlusion for 2 hours and 22 of these were subsequently reperfused. Two-dimensional echocardiography was used ...

classification of occlusion is the first step in diagnosing the relationship between the upper and lower jaw's teeth. based on angle's classification, occlusion is divided into three categories: class i, class ii, and class iii. the aim of this study was to determine the prevalence of occlusion categories, based on angle's classification, in adolescents with permanent dentition in tehran. this ...