A Dilated Surface Appearance on Basiparallel Anatomic Scanning–Magnetic Resonance Imaging Is a Useful Tool for the Diagnosis of Spontaneous Vertebral Artery Dissection in Lateral Medullary Infarction
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Vertebral artery dissection
Magnetic resonance angiography
Vertebral artery dissection
Magnetic resonance angiography
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Dissection of cervical arteries constitutes a medical emergency. Although relatively rarely, activities classified as sports and recreation may be a cause of arterial dissection independently of neck or head trauma. The purpose of the present paper was to present a series of cases of cerebrum-cervical arterial dissection in individuals during or soon after the practice of these sports activities.Retrospective data on patients with arterial dissection related to sports and recreation.Forty-one cases were identified. The most frequently affected vessel was the vertebral artery. A large variety of activities had a temporal relationship to arterial dissection, and jogging was the most frequent of these. This is the largest case series in the literature.Arterial dissection may be a complication from practicing sports.
Arterial dissection
Cervical Artery
Vertebral artery dissection
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Magnetic resonance angiography
Vertebral artery dissection
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Group function occlusion, as well as Canine guided occlusion, are important in the field of . The study about the occlusion includes not only the static relationship of teeth, but it also includes the functional interrelationship and all the components of the system. The aim of the study is to compare group function occlusion and canine guided occlusion among partially patients. The study was conducted in the outpatient of Dental College and Hospital. The data was reviewed and from the total number of 86000 patients between June 2020. The data includes both group function occlusion and canine guided occlusion patients with a partially condition. Then the data was manually verified by 1-2 reviewers and finally tabulated, and SPSS imported and got the results. 522 Data was included in that males are 55.7% and females are 44% and 0.1% transgender. In that majority of them belong to the age group (31-40) yrs. The group function occlusion is 59.5%, and canine guided occlusion is 40.42%, This shows that Male predominant is seen with group function occlusion. Overall, the results showed that in partially conditions, the canine guided occlusion is more prevalent in male gender when it is compared with group function occlusion.
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The dissection of the vertebral artery is rare and is one of the causes of subarachnoid hemorrhage. Recently it has been reported that many cases of Wallenberg syndrome are caused by the dissection of the vertebral artery and that magnetic resonance imaging(MRI), magnetic resonance angiography(MRA) and angiography play an important role in diagnosing the dissection.We report a case of dissection of the vertebral artery diagnosed by MRA in a 63-year-old male who had occipital headache, dizziness and nausea. He had a slight rotatory horizontal nystagmus to the left at the time of the first medical examination. We could diagnose dissection of the vertebral artery on the right side by MRA after nine days of symptoms. Preservation-medical treatment by depressor was performed and the constriction of the right vertebral artery has improved gradually.
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Magnetic resonance angiography
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Vertebral artery dissection causes endothelial changes and stenosis that may lead to recurrent ischemic neurological events. The diagnosis may not be obvious because the dissection may be painless and spontaneous (no obvious trauma). Magnetic resonance angiography has increasingly been used to screen patients for this disorder, but its accuracy has not yet been established.Two patients were admitted with repeated transient ischemic attacks and strokes over 11 months and 1 month, respectively. Neither had a history of trauma, cervical pain, or headache. Magnetic resonance angiography failed to visualize vertebral artery dissections that were later revealed by conventional angiography. One patient's events were stopped by balloon occlusion of the vertebral artery proximal to the posterior inferior cerebellar artery branch.Magnetic resonance angiography is not yet sensitive enough to always visualize vertebral artery dissection. Vertebral artery dissection is a life-threatening condition that requires aggr...
Vertebral artery dissection
Magnetic resonance angiography
Arterial dissection
Cervical Artery
Vertebrobasilar insufficiency
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Using our previously reported "thalamic infarction model in the dogs", it was found that hemorrhagic infarction can be produced at a high frequency following recirculation after 6-12 hours of vascular occlusion. In the present study, in order to elucidate the pathophysiology of hemorrhagic infarction, we have undertaken a study of the relations among the histological findings, degree of ischemia, circulatory dynamics, CO2 response and EEG findings after vascular occlusion of 6 hours. In all animals where rCBF was found to fall to less than 50% due to vascular occlusion, hemorrhagic infarction was found. The hemodynamics of those animals presenting hemorrhagic infarction was such that reflow resulted in a transient increase in rCBF followed by decrease within a short period. After a few hours, rCBF values had fallen to pre-occlusion levels. During the 6 hours occlusion, electrical activity became almost flat, and recovery following reflow was not seen. The CO2 response was found to be disturbed immediately following vascular occlusion and also did not recover following reflow. In contrast, among the animals in which hemorrhagic foci were not found, reflow resulted in recovery of rCBF to pre-occlusion levels within a short period. Electrical activity of the brain and CO2 response were found to be maintained throughout the period of occlusion and thereafter in these animals.
Vascular occlusion
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Vertebral artery dissection causes endothelial changes and stenosis that may lead to recurrent ischemic neurological events. The diagnosis may not be obvious because the dissection may be painless and "spontaneous" (no obvious trauma). Magnetic resonance angiography has increasingly been used to screen patients for this disorder, but its accuracy has not yet been established. Two patients were admitted with repeated transient ischemic attacks and strokes over 11 months and 1 month, respectively. Neither had a history of trauma, cervical pain, or headache. Magnetic resonance angiography failed to visualize vertebral artery dissections that were later revealed by conventional angiography. One patient's events were stopped by balloon occlusion of the vertebral artery proximal to the posterior inferior cerebellar artery branch. Magnetic resonance angiography is not yet sensitive enough to always visualize vertebral artery dissection. Vertebral artery dissection is a life-threatening condition that requires aggressive evaluation and treatment.
Vertebral artery dissection
Magnetic resonance angiography
Arterial dissection
Vertebrobasilar insufficiency
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Using the canine thalamic infarction model, hemodynamics, CO2 responses and thalamic EEG changes were studied in 7 dogs. Of the 7 animals, 4 showed hemorrhagic infarction and 3 did not, following recirculation after 6 hours of vascular occlusion. 1) The rCBF threshold for producing hemorrhagic infarction when recirculation following 6 hours of vascular occlusion was approximately 50% of the pre-occlusion level. 2) rCBF of the animals showing hemorrhagic infarction included hyperperfusion due to recirculation, and then fell to a level below the pre-occlusion level in a relatively short period. The CO2 response became disturbed both during occlusion and after release of occlusion. Thalamic EEG was nearly flat during vascular occlusion and recovery was not seen following recirculation. 3) rCBF of the animals not showing hemorrhagic infarction recovered rapidly to the pre-occlusion level due to recirculation. The CO2 response was somewhat disturbed during occlusion, but recovered following recirculation. Thal...
Vascular occlusion
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