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Dos artículos serán presentados en #embc14 en #Chicago

Los siguientes artículos han sido aceptados en 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC’14)

Adaptation of Five Indirect Insulin Sensitivity Evaluation Methods to Three Populations: Metabolic Syndrome, Athletic and Normal Subjects

Miguel Altuve, Erika Severeyn, Sara Wong

Abstract: Insulin sensitivity is determined using direct or indirect methods. Indirect methods are less invasive than direct methods, but have lower accuracy. The accuracy is set through the Spearman's rank correlation coefficient between the indirect method and a direct method. Since the set of parameters of each indirect method has been set empirically, different values of insulin sensitivity have been reported when they are applied on different populations. In this paper, five indirect methods (Avignon, HOMA--IR, QUICKI, Raynaud, and Matsuda) used to determine insulin sensitivity were adapted to three different populations: athletics, metabolic syndrome and normal subjects. The parameters of each method were varied in a range of values until the optimal value that gives the best correlation coefficient with a gold standard was obtained. Results show that the adaptation procedure led to an improved correlation coefficient. Additionally, the method of Matsuda was the most accurate, followed by the method of Avignon. We have confirmed that each indirect method needs a different set of parameters when it is applied to a specific population in order to obtain an accurate value of insulin sensitivity. 

A New On-Line Electrocardiographic Records Database and Computer Routines for Data Analysis
Carlos A. Ledezma, Erika Severeyn, Gilberto Perpiñán, Miguel Altuve, and Sara Wong

Abstract: Gathering experimental data to test computer methods developed during a research is a hard work. Nowadays, some databases have been stored online that can be freely downloaded, however there is not a wide range of databases yet and not all pathologies are covered. Researchers with low resources are in need of more data they can consult for free. To cope with this we present an on-line portal containing a compilation of ECG databases recorded over the last two decades for research purposes. The first version of this portal contains four databases of ECG records: ischemic cardiopathy (72 patients, 3--lead ECG each), ischemic preconditioning (20 patients, 3--lead ECG each), diabetes (51 patients, 8--lead ECG each) and metabolic syndrome (25 subjects, 12--lead ECG each). In addition, one computer program and three routines are provided in order to correctly read the signals, and two digital filters along with two ECG waves detectors are provided for further processing. This portal will be constantly growing, other ECG databases and signal processing software will be uploaded. With this project, we give the scientific community a resource to avoid hours of data collection and to develop free software.

Estos artículos serán presentados por Miguel Altuve y Carlos A. Ledezma en la ciudad de Chicago, del 26 al 30 de Agosto del presente año.

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