Relationship between hyperspectral indices, agronomic parameters and phenolic composition of Vitis vinifera cv Tempranillo grapes.

BACKGROUND: The phenolic composition of grapes is key when making decisions about harvest date and ensuring the quality of grapes. The present study aimed to investigate the relationship between the detailed phenolic composition of grapes and the agronomic parameters and hyperspectral indices, with the latter being measured via field radiometry techniques. RESULTS: Good correlations were found between phenolic composition (both anthocyanin and flavanol composition) and some hyperspectral indices related to vigor, such as the NDVI (normalized difference vegetation index) and the SAVI (soil adjusted vegetation index). The strongest correlations were observed between the phenolic composition of grape skin at harvest time and variables measured from grapes at veraison time, as well as variables determined from grapevines at harvest time. The potential usefulness of these hyperspectral indices calculated from measurements performed directly on grapes or grapevines for estimating the anthocyanin and flavanol composition of grape skins was indicated by the high coefficients of determination (R2 = 0.7955 and R2 = 0.8594, respectively) as obtained by means of principal component regression. CONCLUSION: According to the results of the present study, hyperspectral indices calculated from measurements performed directly on grapes at veraison time or on grapevines at harvest time may be useful for estimating the anthocyanin and flavanol composition of grape skins. This suggests that field radiometry might provide valuable information for estimating the phenolic composition of grapes, which may prove to be very useful when establishing strategies for harvest planning. © 2017 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

Terapia endovascular en aneurismas vertebrobasilares: experiencia del grupo neurovascular (junio de 1996- octubre de 2004) / Endovascular therapy of vertebral basilar aneurysms: experience of a neurovascular group (june 1996-october 2004)

Este artículo describe las características demográficas y clínicas de una serie consecutiva de 71 pacientes diagnosticados con aneurismas del eje vertebrobasilar, sus características morfológicas y los resultados de la terapia endovascular realizada en cuatro instituciones colombianas durante ocho años.

Pseudoaneurisma postraumático de la arteria vertebral excluído mediante terapia endovascular con preservación de la arteria vertebral / Endovascular treatment for post-traumatic pseudoaneurysm in vertebral artery

Se presenta el caso de un hombre joven, que desarrolló un aneurisma de la arteria vertebral derecha, luedo de sufrir herida con arma cortopunzante en el cuello. Se analiza el procedimiento diagnóstico y se presenta la técnica endovascular utilizada para trombosar el pseudoaneurisma, conservando el vaso nativo

La terapia endovascular: una nueva alternativa en el tratamiento del vasoespamo cerebral asociado a la hemorragia subaracnoidea espontánea / Endovascular therapy: new alternative for treatment of cerebral vasospasm associated with spontaneous subarachnoid hemorrhage

EI vasoespasmo cerebral es la principal causa tratable de muerte e incapacidad por hemorragia subaracnoidea espontánea secundaria a la ruptura de un aneurisma cerebral. Sin embargo, su tratamiento ha sido tradicionalmente frustrante, con resultados desalentadores. A pesar de que aún no se han aclarado del todo los mecanismos fisiopatológicos a través de los cuales ocurre este intrigante fenómeno, en los últimos 9 años, paralelamente al desarrollo de las técnicas endovasculares para el tratamiento de las enfermedades cerebrovasculares, han surgido nuevas alternativas en el manejo del vasoespasmo cerebral. Entre ellas se destacan el uso intraarterial de papaverina y la angioplastia con balón de los vasos cerebrales. Se presenta una revisión del estado actual de estos novedosos instrumentos terapéuticos, así como el reporte de un caso en el cual usamos la papaverina intraarterial en el tratamiento del vasoespasmo quese presentó durante un procedimiento endovascular para excluir un aneurisma de la arteria cerebral media

Cerebral vasospasm is the first treatable cause of death and disability secondary to spontaneous subarachnoid hemorrhage due to ruptured cerebral aneurysms. However, its treatment has been disapointing with poor results. Despite the fact that the physiopathologic mechanisms governing this phenomenon are largely unknown, during the last nine years, simultaneously with the development of endovascular therapy techniques for treatment of cerebrovascular diseases, two new alternatives have emerged in order to alleviate cerebral vasospasm: intraarterial papaverine and cerebral balloon angioplasty. We report the use of intraarterial papaverine in one case to treat cerebral vasospasm presented during the endovascular therapy procedure; a review of literature is included