Abst rac t . AORTA has been proposed as an implementable real-time algebra for concurrent systems where event times, rather than values of data, are critical. In this paper we discuss an extension to AORTA to include a formal data model, allowing integration with a variety of modelbased data specification languages. An example is given using VDM with AORTA to define a time-critical system with ...

The descending aorta is one of the most important vessel structures in the body. It is the largest artery in the body that runs down through the chest and the abdomen. The descending aorta begins below the arch of the aorta and ends by splitting into two great arteries (the common iliac arteries), which go to the legs. It has been observed that atherosclerosis of the descending aorta is a usefu...

Measurement of oxygen uptake by thoracic and abdominal segments of rat aorta showed significantly lower rates in the abdominal than in the thoracic aorta of adult animals. The evidence suggests that as a rat ages the respiratory rate of abdominal aorta falls more sharply than that of the thoracic segment. This result may provide an explanation for the relatively high incidence of atherosclerosi...

INTRODUCTION Aneurysm is a disease in which an area of arterial wall is expanded as the result of the decreased resistance of the wall structure against the internal pressure. In most cases the wall is fatally ruptured. Aneurysm is one of the serious diseases of circulatory system, and the thoracic aorta is known to be a site where aneurysms frequently develop. The thoracic aorta consists of th...

Three deaths from dissection of the aorta in a series of 157 adult women with Turner's syndrome are reported. These are greatly in excess of the numbers expected. None of the three patients had a coarctation of the aorta. One had aortic regurgitation but there was no reason to believe that the aorta in the other two patients had been subjected to unusual haemodynamic stresses. Cystic medial nec...

The current work is done to see which artery has more chance of having cardiovascular diseases by measuring value of pressure gradient in the common carotid artery (CCA) and ascending aorta according to age and gender. Pressure gradient is determined in the CCA and ascending aorta of presumed healthy volunteers, having age between 10 and 60 years. A real 2D model of both aorta and common caroti...