摘要:

ABSTRACT.Arteriovenous malformations (AVMs) are congenital abnormalities found at the arteriole-venule junctions, where a normal capillary bed would otherwise exist. EEG findings in patients with AVMs often show confusing results, with incorrect localization of slow wave activity or sharp waves. Conversely, patients with large AVMs sometimes have normal EEGs.This report is a case history of a child who initially presented with seizures at 11 years of age, and was subsequently found to have an AVM. His malformation was surgically excised, and he has been followed postoperatively for a 1 -year period. The combination of clinical presentation, seizure manifestations, and EEG findings of this patient together implicated several different foci of abnormality, although these different foci were all within the“watershed”area of the middle cerebral artery. These abnormalities all disappeared immediately postoperatively. This multiplicity of localization prompted a literature review, which then led to some interesting discussion of the effects of A VMs upon local cerebral perfusion and function. A further question arises as to the effect AVM excision may have on the post-surgical EEG—can it cause normalization of the EEG?

ISSN:0002-9238    

DOI:10.1080/00029238.1994.11080473

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

ABSTRACT.Continuous EEG was recorded from 96 children and 9 adults undergoing deep hypothermia with or without a period of low perfusion or complete circulatory arrest. Hypothermia caused a progressive decline in amplitude and frequency and, in 41% of our cases, synchronous or asynchronous periodic paroxysmal activity. At the time of the anticipated arrest, which occurred at an average temperature of 16.3°C., 73% had persistent EEG activity. No EEG activity was seen within one minute after the arrest. Activity began to return with rewarming in a reversal of the pattern seen with progressive hypothermia. In patients without an arrest, activity had returned to normal by the time normothermia was regained. This process took longer in those with an arrest although the majority were back to prebypass baseline by the end of the procedure. The EEG changes were the same for children and adults.

ISSN:0002-9238    

DOI:10.1080/00029238.1994.11080474

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

ABSTRACT.The utility of intraoperative somatosensory evoked potential (SSEP) monitoring has been addressed over the last decade and SSEP monitoring has been widely used in a variety of surgical procedures. Most of the literature has dealt with intraoperative monitoring in adult patients. We have employed intraoperative SSEP monitoring in pediatric patients since the early 1980s. Over the years we have monitored over 300 operations, most done in children less than 15 years old, undergoing corrective scoliosis surgery. Based upon our experience, we have developed techniques addressing problems of surgically monitoring children and have found intraoperative SSEP monitoring to be useful in pediatrics, understanding that a number of important differences must be addressed when monitoring this age group.

ISSN:0002-9238    

DOI:10.1080/00029238.1994.11080475

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

ABSTRACT.Computer manipulation of EEG data requires that the data be in digital form. Many interesting EEGs, however, are recorded only in analog form on paper tracings. This article presents a method of EEG data digitization of analog recordings. This method uses a hand-held scanner to scan and digitize the EEG“image”on the paper tracing and then extract the original signal. Some intrinsic difficulties of practical application and future prospects of the approach are discussed.

ISSN:0002-9238    

DOI:10.1080/00029238.1994.11080476

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

ISSN:0002-9238    

DOI:10.1080/00029238.1994.11080477

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

ISSN:0002-9238    

DOI:10.1080/00029238.1994.11080478

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

ISSN:0002-9238    

DOI:10.1080/00029238.1994.11080479

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

ISSN:0002-9238    

DOI:10.1080/00029238.1994.11080480

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor