Selvakumar, C J (2010) A study of 150 cases of posterior circulation stroke. Masters thesis, Madurai Medical College, Madurai.
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Abstract
Stroke is known to human race since antiquity. The seventh century great Indian physician, Charaka lucidly described the symptoms of stroke which he called `Pakshaghat` meaning hit one half of body. The other synonyms are ardhang or lakwa. According to Charaka, stroke affects either left or right side of body leading to impaired mobility and function of that half of body (hemiparesis) and difficulty in speaking which may be inability to talk at all (aphasia) or slurred speech (dysarthria). He had also identified head as the seat of vital organ, controlling the senses and nerve centers of the whole body. These meticulous observations of stroke symptoms are relevant even today. Stroke is one of the major causes of death disability and dependency among all the neurological disorders. The World Health Organization (WHO) defines stroke as rapidly developing clinical symptoms and / or signs of focal, at times global loss of cerebral function, with symptoms lasting more than 24 hours or leading to death, with no apparent cause other than of vascular origin. The global prevalence of stroke is estimated to be 5 to 8 /1000. Globally stroke incidence was also variable according to the ethnic differences in a common geographical location and ranged from 93 to 223/1,00,000 population. Epidemiology of stroke in India is difficult to study due to multiple factors. Nevertheless, many investigators have addressed this question in various regions of India, which may be considered representative of the whole population. The crude prevalence rate was 220/1,00,000(range : 44-843/1,00,000). The incidence rate of stroke in India was estimated to be 13/1,00,000 in a study done at Vellore on a population sample of 2,58,576 followed over two years, while another study conducted at Rohtak found the stroke incidence to be 33/1,00,000 (27/1,00,000 for first ever stroke). The stroke risk increases steeply as the age advances. In a study from Kashmir, prevalence rate of stroke was 41 per 1,00,000 population in the age range of 15-39 years, which increased to 1,075 per 1,00,000 for the age group of 50-59 years. The posterior circulation, unlike the intracranial portions of the anterior circulation, is prone to atherosclerosis as much as other systemic arteries. In the case of one vertebral artery being occluded, collateral flow comes from the opposite vertebral artery, from muscular cervical artery branches, and from posterior communicating artery. The intracranial branches of the vertebral artery and basilar artery were minutely studied and a syndrome was described for each prompting a cynic to remark the neurologic equivalent of Hall of Fame is a brainstem eponym. AIM OF THE STUDY: To study the demographic profile and symptoms To study the risk factors To study the pattern of posterior circulation stroke To prognosticate the posterior circulation stroke based on clinical and radiological findings. CONCLUSION: All patients with brain ischemia deserve full evaluation of their brain for vascular lesions. With the advent of newer techniques, MRI with DW imaging, MRA, extra cranial and transcranial doppler studies it is possible to investigate the brain and stroke mechanisms quickly and noninvasively. Cardiac investigations are just as important in patients with posterior circulation ischemia, because a considerable number of posterior circulation infarcts are cardio embolic.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | posterior circulation stroke ; case study. |
| Subjects: | MEDICAL > Neurology |
| Depositing User: | Kambaraman B |
| Date Deposited: | 03 Jul 2017 08:25 |
| Last Modified: | 03 Jul 2017 08:25 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/789 |
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