Intracranial etiology

At the present time, pheochromocytoma and intracranial lesions are the only causes of human hypertension which are definitely known to involve overactivity of the sympatho-adrenal system. However, presumptive evidence is accumulating to indicate that neurogenic factors may be involved in early essential hypertension, and it is possible that adequate adrenergic blockade early in the course of such hypertension may be effective in aborting its development. Only additional evidence regarding the etiology of essential... 

The evaluation of acute stroke patients with CTA is being performed to evaluate for the underlying vascular etiology (Smith et al., 2006). CTA can nicely demonstrate areas of stenosis or thrombosis in the arteries. The presence of a large vessel intracranial occlusion in an acute stroke patient has been found to even be an independent predictor of poor outcome (Smith et al., 2006). Also, computed tomographic venography has been found to be beneficial for evaluating patients for the presence of venous thrombosis. 

CTA of the neck can often elucidate the etiology of an intracranial occlusion. In older patients, carotid... 

Classification of intracranial aneurysms may be based on morphology, size, location and etiology. The majority of intracranial aneurysms are true aneurysms containing all layers or components of the normal vessel wall. In contrast, in false aneurysms or pseudoaneurysms, the vascular lumen does not enlarge, although the external diameter of the abnormal segment may be increased. These aneurysms are rare within the skull. 

---