7 research outputs found
Palinology and its application to environmental and paleoclimatic reconstructions I: A review about the pollinic representation of vegetation
The Palinological Methodology presents some objections that must be beared in mind when the pollinic analyses are used for paleoenvironmental and paleoclimatic reconstructions. In this work the objections affecting the accuracy of the pollinic representation of vegetation are reviewed. These objections are production and dispersion of pollen grains, differential conservation, determination level and representation of the different types of vegetatio
Palinology and its application to environmental and paleoclimatic reconstructions II: A review about the interpretation of vegetation changes
To determine the causes ofthe vegetation changes is the most important factor in paleoenvironmental and paleoclimatic reconstructions from pollinic analyses. The perturbances which lead to these changes can be natural or anthropogenic ones. From 3.500 years B.Ê it becomes more dificult to interpret the vegetation changes due to the vegetation «response» to the natural perturbances can be hid by the anthropogenic activit
Land use and environment during the late Holocene in the Berrueco Area (Guadarrama range, Madrid)
We present the results of palynologycal analyses carried out both in a core obtained from a deposit
located in Sierra de Guadarrama (Madrid), and modern pollen data from one transect across Tolla
Collado de El Berrueco-El Berrueco. The comparison between these data sets shows that the pollen
spectra faithfully reflect the current taxa in the study area. In addition, these results have permitted to
distinguish several phases of the vegetation dynamic and human activity from the Late Holocene in El
Berrueco area, inferred from the development of anthropozoogenic tax
Spatial climate dynamics in the Iberian Peninsula since 15 000 yr BP
Climate changes in the Iberian Peninsula since the Last Glacial Maximum are
associated with distributional shifts of major Mediterranean and European
temperate species. The dynamic relationship between climate and species in
the past may be retrieved from the fossil records available in the Iberian
Peninsula. We have used an extensive set of pollen records to reconstruct
spatial layers (1 kyr interval) of January minimum temperature, July maximum
temperature, and annual precipitation over the time period between 15 and
3 ka. A functional principal component analysis was used to summarise the
spatial evolution of climate in areas that share similar climate trends. When
compared between them, the identified four areas show different climate
trends over the studied period and are coherent with the existence of
multiple refugial areas within the Iberian Peninsula
Benefit of primary percutaneous coronary interventions in the elderly with ST segment elevation myocardial infarction
Objective: Primary percutaneous coronary intervention (P-PCI) has demonstrated its efficacy in patients with ST segment elevation myocardial infarction (STEMI). However, patients with STEMI ≥75 years receive less P-PCI than younger patients despite their higher in-hospital morbimortality. The objective of this analysis was to determine the effectiveness of P-PCI in patients with STEMI ≥75 years. Methods: We included 979 patients with STEMI ≥75 years, from the ATención HOspitalaria del Síndrome coronario study, a registry of 8142 consecutive patients with acute coronary syndrome admitted at 31 Spanish hospitals in 2014-2016. We calculated a propensity score (PS) for the indication of P-PCI. Patients that received or not P-PCI were matched by PS. Using logistic regression, we compared the effectiveness of performing P-PCI versus non-performance for the composite primary event, which included death, reinfarction, acute pulmonary oedema or cardiogenic shock during hospitalisation. Results: Of the included patients, 81.5 % received P-PCI. The matching provided two groups of 169 patients with and without P-PCI. Compared with its non-performance, P-PCI presented a composite event OR adjusted by PS of 0.55 (95% CI 0.34 to 0.89). Conclusions: Receiving a P-PCI was significantly associated with a reduced risk of major intrahospital complications in patients with STEMI aged 75 years or older
Benefit of primary percutaneous coronary interventions in the elderly with ST segment elevation myocardial infarction
Altres ajuts: Supported by: MARATO TV3 (081630); Red RedIAPP RD06/0018; CP12/03287; CIBER Epidemiología y Salud Pública; CIBERCV de enfermedades Cardiovasculares, Fondo Europeo de Desarrollo Regional (FEDER) (European Regional Development Funds -ERDF-); FIS CP12/03287, FIS 14/00449, FIS PI081327, FIS INTRASALUD PI1101801.Primary percutaneous coronary intervention (P-PCI) has demonstrated its efficacy in patients with ST segment elevation myocardial infarction (STEMI). However, patients with STEMI ≥75 years receive less P-PCI than younger patients despite their higher in-hospital morbimortality. The objective of this analysis was to determine the effectiveness of P-PCI in patients with STEMI ≥75 years. We included 979 patients with STEMI ≥75 years, from the ATención HOspitalaria del Síndrome coronario study, a registry of 8142 consecutive patients with acute coronary syndrome admitted at 31 Spanish hospitals in 2014-2016. We calculated a propensity score (PS) for the indication of P-PCI. Patients that received or not P-PCI were matched by PS. Using logistic regression, we compared the effectiveness of performing P-PCI versus non-performance for the composite primary event, which included death, reinfarction, acute pulmonary oedema or cardiogenic shock during hospitalisation. Of the included patients, 81.5 % received P-PCI. The matching provided two groups of 169 patients with and without P-PCI. Compared with its non-performance, P-PCI presented a composite event OR adjusted by PS of 0.55 (95% CI 0.34 to 0.89). Receiving a P-PCI was significantly associated with a reduced risk of major intrahospital complications in patients with STEMI aged 75 years or older