RESUMO
Introduction: Cervical rib is relatively uncommon congenital abnormality that originates from the seventh cervical vertebrae and rarely from the sixth vertebrae. The purpose of this paper is to consider that this abnormal condition is an important cause of neurovascular compression at the thoracic outlet
Methods: In this study all patients who were referred to radiology department of Isfahan hospitals [Iran] for chest X-ray or other cervical films, for any reasons, were evaluated for cervical rib and anyone who had this abnormality was entered in this study. Here, we performed Nerve Conduction Velocity Test [NCV] and Doppler sonography, depending on the vascular or neurological symptoms
Results: The results of this study show that the incidence of the neurological compression was higher than vascular compression. In addition, the prevalence of neurological complication in female was high [85.7%] and a significant percentage of them were above 30 years
Conclusion: Cervical rib occurs more commonly in women and have different prevalence rates in different ethnic populations. Moreover, a high percentage of them have neurological complication which is a symptom of thoracic outlet syndrome
RESUMO
Atherosclerosis and cardiovascular diseases are the most common causes of death in western countries. The beneficial effect of ascorbic acid on various organs has been reported. The present study was conducted to determine the effect of ascorbic acid on the right and left coronary arteries of male rabbits fed with high-cholesterol diet. Twenty white male rabbits [mean weight: 950 g] were weighed and randomly divided into two groups. For 40 days, group 1 [n=10] was given a high-cholesterol [1%] diet, group 2 [n=10] was fed with a high-cholesterol diet and ascorbic acid [100 mg/kg]. Then both of the groups were weighed and the animals were sacrificed. The right and left coronary arteries were dissected and then fixation, tissue processing, histological sectioning and H and E staining were carried out and sections were studied by light microscopy. The results were analyzed by using the Mann Whitney test. Group 2 which received ascorbic acid had no fatty streaks in their coronary arteries. Significant difference in mean weight was observed before and after the diet in both groups [P<0.05]. Histopathological study of the coronary arteries showed that the rabbits which received ascorbic acid diet did not develop fatty streaks. Thus ascorbic acid exerts an apparently inhibitory effect on fatty streak formation and may slow down or prevent atherosclerosis by countering the side effects of a high-fat meal