Abstract:
:The goal of the present study was to develop and evaluate a new method for the prediction of unexplained syncope occurrences. Diagnosis of syncope is currently based on the reproduction of symptoms in combination with hypotension and bradycardia induced by a 45 min 60-70 degrees head-upright tilt test (HUTT). The main drawback of this widely used test concerns its duration that reaches 55 min if the patient does not faint. Our method is a first step in the avoidance of the HUTT. An electrocardiogram and a transthoracic impedance waveform were recorded for 10 min of supine rest of a HUTT in 128 patients with a history of unexplained recurrent syncope. Seven indices were computed on the transthoracic impedance and its first derivative. The prediction quality of every subset of these variables, mixed with age and sex, has been tested by a support vector machine in a retrospective group of 64 patients (100% of sensitivity and 100% of specificity was reached). The best subset obtained has been evaluated prospectively in a group of 64 patients (94% of sensitivity and 79% of specificity was reached). These results compare very favorably with published results for other unexplained syncope detectors.
journal_name
Physiol Measjournal_title
Physiological measurementauthors
Schang D,Feuilloy M,Plantier G,Fortrat JO,Nicolas Pdoi
10.1088/0967-3334/28/2/007subject
Has Abstractpub_date
2007-02-01 00:00:00pages
185-97issue
2eissn
0967-3334issn
1361-6579pii
S0967-3334(07)23477-Xjournal_volume
28pub_type
临床试验,杂志文章abstract::Cooperative sensors is a novel measurement architecture that allows the acquiring of biopotential signals on patients in a comfortable and easy-to-integrate manner. The novel sensors are defined as cooperative in the sense that at least two of them work in concert to measure a target physiological signal, such as a mu...
journal_title:Physiological measurement
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更新日期:2015-04-01 00:00:00
abstract:OBJECTIVE:Cognitive reserve (CR) refers to the capacity of the brain to actively cope with damage via the implementation of remedial cognitive processes. Traditional CR measurements focus on static proxies, which may not be able to appropriately estimate dynamic changes in CR. This study therefore investigated the cogn...
journal_title:Physiological measurement
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journal_title:Physiological measurement
pub_type: 杂志文章
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abstract::The paper describes the development of an electrical impedance tomography (EIT) system for gynecologic research. The GIT (gynecological impedance tomography) system has 48 electrodes and is embedded on a small space (30 mm diameter and 20 mm height) inside of the vaginal probe. The system provides real-time (one shot ...
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journal_title:Physiological measurement
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journal_title:Physiological measurement
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更新日期:2011-06-01 00:00:00
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pub_type: 临床试验,杂志文章
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