La Pampa Research Articles

Ecotype and fungal endophyte status differentially affect soil arbuscular mycorrhizal community of the native grass Bromus auleticus

In wild native grasses, the colonization of arbuscular mycorrhizal fungi (AMF) is higher in Epichloë-infected plants (E+) compared to Epichloë-free plants (E−). To explore the correlation between the host ecotype, Epichloë association, and the soil AMF community, a common garden experiment was conducted. To achieve this, the soil AMF community of two Bromus auleticus ecotypes, El Palmar (EP) and La Pampa (LP), with either E+ or E−endophyte status, was analyzed using high throughput sequencing. The total mycorrhizal colonization of E+ plants from both EP and LP ecotypes showed significantly higher values (178.68% and 132.34% respectively) compared to E−plants, regardless of the ecotype. Alpha and Beta diversity analysis revealed significant differences in AMF richness and composition between the El Palmar (EP) and La Pampa (LP) ecotypes. However, no differences were observed in the soil AMF communities between E+ and E−plants. In conclusion, this study demonstrates that Epichloë symbiosis and host ecotype have distinct effects on various aspects of the AMF-Bromus auleticus association.

New light on the late Middle Miocene–Early Pliocene representatives of Lagostomus (Chinchillidae, Rodentia) from Cerro Azul Formation, Argentina

Lagostominae (Rodentia, Caviomorpha, Chinchillidae) include a single living species, the plains vizcacha Lagostomus maximus, but representatives of this subfamily are registered since the Early Miocene. The oldest record of this genus was recently extended to the late Middle Miocene in one locality of center of La Pampa Province. Previously, from levels of the Late Miocene Cerro Azul Formation in Buenos Aires and La Pampa provinces, two species of Lagostomus were recognized based on specimens from two localities, L. telenkechanum from Arroyo Chasicó (Buenos Aires Province) and L. pretrichodactyla from Salinas Grandes de Hidalgo (La Pampa Province). In the present work, new materials from these two and other localities of the Cerro Azul Formation are analyzed. This study supports the presence of both species, which had coexisted in several of the analyzed assemblages. The studied sample includes several incomplete specimens and others interpreted as juvenile individuals, which can only be determined as Lagostomus sp. Also, a similar behavior to that of the extant L. maximus (i.e., gregarious populations with fossorial habits) is proposed to explain the different representation of Lagostomus in each assemblage. In Cerro Azul Formation the presence of representatives of Lagostomus is mainly linked with levels with paleosols and accumulations by predator activity. Finally, we conclude that this genus has less biostratigraphic value than previously thought, at least for central Argentina.

From metaphor to materiality: grounding intersectional legal thought

ABSTRACT When I first decided to investigate an intersectional approach to frame forces operating in cases of indigenous women affected by land conflicts, I had not envisioned that the metaphorical aspect would be such a crucial part of operationalizing the concept. Since its first formulation, the term intersectionality has been attached to the image of intersecting roads, and still today when searching for online videos for pedagogical purposes, the results show cars driving towards people standing on crossroads to explain the meaning. Intersecting roads, however, also emerged in my fieldwork in a literal maner. The passage from metaphor to materiality of the concept of intersectionality, I argue, can affect the identitarian logic that predominates in most proclaimed legal intersectional approaches. The paper proposes to bring intersectionality to materiality by re-imagining the metaphor of intersectionality through an ethnographic approach to indigenous peoples’ land conflicts in La Pampa, Argentina.

The synanthropic austral-most record of the species Loxosceles hirsuta and the formal record of Loxosceles laeta (Araneae: Sicariidae)

A formal record of the medically important species Loxosceles laeta (Nicolet, 1849) and new records of Loxosceles hirsuta Mello-Leitão, 1931 (Araneae: Sicariidae) are provided for La Pampa province, Argentina, comprising its southernmost record. The specimens of L. hirsuta in this work were found inhabiting human structures and were collected in different localities, between long time lapses, which suggests that L. hirsuta much like L. laeta is highly synanthropic and established in La Pampa.

‘Was I an indio?’ Ambivalent self-ascriptions, gatherings and scatterings in the trajectory of a Ranquel man in central Argentina

ABSTRACT This article presents Eugenio’s life story, which begins with his youth in the 1940s as a puestero ‘among the Indians’ in western La Pampa (Argentina). The narrative traces his migration to the city, his incorporation into the labor market, his involvement in union life, and finishes with his current participation as a werken in a Ranquel community. As I argue, for Eugenio and other Ranqueles I have worked with, the central axis of articulation of identity and difference, continuity and discontinuity is not anchored in a particular culture to recover. Rather, it is situated at the level of relationships, in the alternation over time between periods of ‘being all together’ and periods of desparrame or scattering. Eugenio’s life story follows the paths of kinship, friendship, and neighborhood, and introduces multiplicity, hiatuses, and contradictions, while providing clues as to how Ranqueles themselves name, characterize and explain ethnic processes usually labeled by anthropologists as ‘ethnogenesis’ or ‘re-emergence’.

New and noteworthy species of the genus Epidendrum (Orchidaceae, Laeliinae) from the Área de Conservación Privada La Pampa del Burro, Amazonas, Peru.

Fourteen species of the genus Epidendrum, recently collected in the Área de Conservación Privada La Pampa del Burro (ACPPB), five of them new to science (Epidendrumechinatiantherumsp. nov., E.imazaensesp. nov., E.parvireflexilobumsp. nov., E.rosulatumsp. nov., and E.ochrostachyumsp. nov.), are described and illustrated. The other species include a new record for Peru (E.acrobatesii) and four for the department of Amazonas (E.brachyblastum, E.forcipatum, E.mavrodactylon, and E.tridens). Epidendrumenantilobum is here considered a synonym of Epidendrumbrachyblastum. The type locality of Epidendrumcryptorhachis, originally stated as Ecuador, Guayabamba, is corrected to indicate that it refers to the valley of Guayabamba, Rodríguez de Mendoza, Amazonas, Peru. Our results show the need to continue conducting botanical exploration in the ACPPB as a baseline for subsequent studies, including a full inventory of the orchid diversity.

Ancient parasite infections from the main Pampean-Patagonian cemetery of hunter-gatherer of prehistoric times: Archaeological site Chenque I (Parque Nacional Lihué Calel, La Pampa Province, Argentina)

Paleoparasitological studies of human sediment samples from prehistoric times of Argentina are scarce. The objective of the present study is to enhance the knowledge of parasitic infections affecting hunter-gatherer populations inhabiting the Pampean region of Argentina in prehistoric times. A total of 33 samples from 12 inhumation structures of archaeological site Chenque I, the unique cementery studied in Argentina until now from a paleoparasitological point of view, were studied. Chenque I constitute the greater repository of human archaeological remains of La Pampa province. Thirty-one samples came from human burials, and 2 samples from a dog retrieved in a burial, associated with a child. By humans, 11 samples correspond to males, 13 to females, and 7 to undifferentiated individuals. A total of 5 samples corresponds to control samples and were taken under the skull. Paleoparasitological examination revealed that 8 of the 33 sediment samples resulted positive for parasite remains applying the rehydration and spontaneous sedimentation technique with or without addition of HCl (10%). The pre-treatment of samples with HCl as a preliminary step allowed a greater recovery of parasitic remains compared to standard spontaneous sedimentation procedure. The most common parasite species found was Trichuris trichiura being probably one of the parasites that commonly affect human populations inhabiting the region. The low preservation evidenced by the parasite remains recovered indicate a taphonomic interference in the data of parasite assemblages, which probably produce a bias in the recovery of other parasite species that could infect these ancient populations. Proceed in the study of new human samples to improve the knowledge of parasitic infections affecting ancient populations inhabiting the studied region is necessary.

Strategic management of the agroindustrial network of first transformation in La Pampa, Argentina

ABSTRACT The objective of this work is to measure and analyze the management of resources and strategic capacities of the agroindustrial organizations of the first transformation of the province of La Pampa, Argentina. The strategic management of the network, measured in aggregate terms, can be classified as intermediate. The most positive aspects are maintaining the image of the company, the importance of price, and the strategic value that know-how has for businesses. As factors with performance to improve, there are the lack of conventions and agreements with scientific and technical organizations that promote innovation processes and the nonuse of a command board for the strategic and operational management of the business. The flour, dairy, and balanced food complexes were the ones that presented the best strategic management performance. The strategic management of first-transformation agroindustries is directly related to capacities (management training and seniority in the business) and resources (scale).

Burrow systems of modern subterranean rodents (Ctenomyidae): key neoichnologic features and recognition of fossil examples

This study is aimed to identify the distinctive ichnologic features of burrow systems of two ctenomyid species of extant solitary and subterranean rodents (Ctenomys azarae and C. talarum occidentalis) from La Pampa Province (Argentina). A total of 12 active burrows from different biogeographic provinces were cast with polyurethane foam, then excavated and the entire system was mapped. Ctenomyid burrow systems are shallow (average depth 0.30 m), branched, and subhorizontal with several plugged entrances, having a main tunnel and secondary ones arranged in a single level. Curved length, tortuosity, fractal dimension branching angles, and the scarcity or absence of chambers are similar in both species. The average horizontal diameter is 66 mm, the burrow cross-section is subcircular to vertical elliptical, and entrance ramps slope at an average of 22°. Surface ornamentation in the form of sets of three curved claw traces composing a chevron pattern is dominant. Ctenomys azarae is distinguished from C. talarum occidentalis by the presence of food caches and wider sets of claw traces. Ctenomyidae burrows are easily distinguished from those of Octodontidae and Caviidae using the relative diameter index. The outlined criteria are applied to identify fossil examples of Late Miocene-Holocene ctenomyid burrows.

The oldest Andean synorogenic fossiliferous deposits of the Miocene Cerro Azul Formation, central Argentina

Cerro Patagua is a locality with fossiliferous outcrops of the Cerro Azul Formation in La Pampa Province (central Argentina). First fossil remains were known in 1999 and assigned to the Chasicoan Stage/Age (Late Miocene, Tortonian) after the presence of the Octodontoidea rodent Chasichimys bonaerense. Later references to vertebrate remains were scarce and mostly limited to some mentioned taxa in broader faunal contexts. Now, we present a detailed taxonomic study of the entire mammal assemblage from Cerro Patagua, which evidences that most taxa are typical of the Chasicoan Stage/Age. A peculiar enterolith-like structure, recovered from loess levels, is also described, and several taphonomic aspects observed on fossils are related to their level of provenance. In addition, we offer stratigraphical interpretations of the Cerro Azul Formation and a geomorphological analysis of the Cerro Patagua area, and provide a detrital zircon dating of 12.3 ± 1.8 Ma. This result reflects the time interval 14.1–10.5 Ma, a temporal range that includes the Serravalian Stage (late Middle Miocene) and could indicate that the oldest synorogenic deposits could have begun to accumulate at the end of this stage. Even considering the minimum age of this interval (Tortonian Stage), this dating is the oldest obtained for the Cerro Azul Formation, compared with previous published data from Arroyo Chasicó locality (9.43–9.07 Ma). This assignment could explain that taxa from Cerro Patagua show affinities with Late Miocene mammal assemblages from central Argentina, as well as with older faunas from Patagonia and Bolivia.

Actual State of Knowledge of the Limno-Terrestrial Tardigrade Fauna of the Republic of Argentina and New Genus Assignment for Viridiscus rufoviridis (du Bois-Reymond Marcus, 1944)

Limno-terrestrial tardigrades of Argentina had been studied starting in 1908 and for a long time by European researchers, most frequently in the Patagonian region (incl. the Land of Fire). Starting during the 1980s, Claps, Rossi and collaborators published many surveys, studying other regions also, but with taxonomic criteria at that time. Since the 2000s, methodical and continuous studies using more modern criteria, have been carried out at the National University of La Pampa, contributing to the faunistic, taxonomic and ecological knowledge (including new species descriptions). This paper provides a comprehensive list of the limno-terrestrial tardigrade fauna reported from Argentina, with pertinent evaluations, owing to a careful study of every pertinent piece of literature since 1908, also solving some problems of discordance between the main past checklists. Summarizing, 39 genera and 119 species are present; of these, 72 represent records accepted by the literature, while 47 are records questioned in the literature but which represent distinct taxa surely present in Argentina; 14 additional taxa, instead, are clearly dubious. The authors also report the correct genus assignment to Viridiscus rufoviridis (du Bois-Reymond Marcus, 1944), which now becomes Barbaria rufoviridis comb. nov.

Dónde, cuándo y cómo ocurren grandes incendios en la provincia de La Pampa, Argentina: Una caracterización basada en sensores remotos

Fire, as a catastrophic phenomenon, is devastating, dangerous and costly for a region. Despite its relevance, little is known about the spatial and temporal dynamics of this phenomenon in the province of La Pampa. The general objective of this work was to identify and characterize the fires, particularly the most extensive ones, that occurred in the province of La Pampa during the period July 2001-June 2017 (16 campaigns), based on the use of information provided by remote sensors. For this, information from MODIS Rapid Response heat sources, distributed by the FIRMS web system, was used. Combining information from spectral indices (NBR), precipitation data and vegetation types, the influence of predisposing factors on the occurrence of these events was studied It was observed that, in the analyzed period, between 21200 and 667500 ha/year were burned, with an average event size of 708 ha. However, in the last four seasons, an increase was recorded both in the total area burned and in the number of events ≥5 thousand ha. In the last campaign, in addition to registering the largest burned area (667500 ha), the largest number of events (10) ≥10 thousand ha (50% of the total events in this category) were observed. The total burned area in a campaign was positively related to the rainfall of the previous campaign (R2=0.76, P<0.001). The most affected vegetation was the xeric forest, followed to a lesser extent by the carob forests and the steppes and psamophilic scrubs. It is expected that the characterization of the spatial and temporal dynamics of fires using sensors will contribute to the design of prevention, early warning and control systems in the region.

Native Fauna of Tardigrades from Two Natural Areas of the Argentina Republic.

Understanding and preserving biodiversity in natural habitats is crucial due to their rapid degradation and destruction. The meiofauna of natural areas is less well known than the macroscopic life. Tardigrades are common in limno-terrestrial meiofauna and can indicate environmental conditions. In this study, we expand our understanding of the taxonomy and ecology of tardigrade communities in two natural reserves in Argentina by examining the environmental factors that can affect them and the species that could be used as indicators. In 2018, sampling occurred in the Parque Luro Provincial Reserve (province of La Pampa) and the Poligono A Municipal Ecological Reserve (province of Salta). Samples were taken from epiphytic communities that grow on the bark of trees. Various environmental and microhabitat factors were taken into account. In the province of La Pampa, there were 1326 specimens of five species, and in the province of Salta, there were 212 specimens of nine species. The tardigrade communities in Salta exhibited statistically higher diversity than those in La Pampa. Temperature and moisture affected the tardigrade community of Parque Luro Provincial Reserve, while the microhabitat thickness affected those of Poligono A Municipal Ecological Reserve. The species turnover shaped the community of Salta, while nesting shaped the community of La Pampa.

Combined isotope study of the Ordovician Cerro de los Viejos Granite, La Pampa province, Argentina. Its derivation from the autochthonous, early Mesoproterozoic southwesternmost border of the Río de la Plata craton

We have carried out the zircon U–Pb SHRIMP dating of the Cerro de los Viejos (CLV) Granite of southern La Pampa province, Argentina, which has yielded a concordia age of 468.0 ± 2.7 Ma, and determined the average Hf TDM model age of the dated zircon grains at 1491 Ma (Lower Mesoproterozoic; Calymmian), with an average epsilon Hf value of −3.13. Given the Ordovician (Darriwilian) crystallization age newly obtained for the CLV Granite, it becomes apparent that its previously known muscovite K–Ar Permian age of ca. 261 Ma would likely represent the age of the conspicuous shearing/mylonitization distinctive of this granitic body.Based on the new geochronologic and isotopic study of the CLV Granite, which also bears juvenile Rhyacian or “Transplatense” inheritance (aged at ca 2116 Ma, with average Hf TDM 2.4 Ga and average epsilon Hf value + 4.23) –an inheritance not known to occur in the neighbouring Patagonia or Pampia terranes–, as well as on comparisons with all the available geochronologic, isotopic, geophysical and geological data of the study region, in addition to broader tectonic considerations, we view the Ordovician CLV Granite as derived from the autochthonous, early Mesoproterozoic (Calymmian) southwesternmost portion of the Río de la Plata craton.The location of the CLV Granite would indicate that the peraluminous Ordovician magmatism of the southern La Pampa province, Argentina, straddles the Cambrian tectonic boundary between the Pampia terrane and the Río de la Plata craton.The CLV Granite would have been intruded in the immediate western continuation of the unexposed, E-W elongated upper crustal high/block recently identified by geophysical methods slightly to the east of the CLV Granite, the delineation of this block following the persistent sub-latitudinal structural fabric of the southern Río de la Plata craton, having also been reinforced by its probably late Middle Permian uplift coeval with the shearing of the CLV Granite.

Phytoliths in particulate matter released by wind erosion on arable land in La Pampa, Argentina

Silicon (Si) is considered a beneficial element in plant nutrition, but its importance on ecosystems goes far beyond that. Various forms of silicon are found in soils, of which the phytogenic pool plays a decisive role due to its good availability. This Si returns to the soil through the decomposition of plant residues, where they then participate in the further cycle as biogenic amorphous silica (bASi) or so-called phytoliths. These have a high affinity for water, so that the water holding capacity and water availability of soils can be increased even by small amounts of ASi. Agricultural land is a considerable global dust source, and dust samples from arable land have shown in cloud formation experiments a several times higher ice nucleation activity than pure mineral dust. Here, particle sizes in the particulate matter fractions (PM) are important, which can travel long distances and reach high altitudes in the atmosphere. Based on this, the research question was whether phytoliths could be detected in PM samples from wind erosion events, what are the main particle sizes of phytoliths and whether an initial quantification was possible.Measurements of PM concentrations were carried out at a wind erosion measuring field in the province La Pampa, Argentina. PM were sampled during five erosion events with Environmental Dust Monitors (EDM). After counting and classifying all particles with diameters between 0.3 and 32 µm in the EDMs, they are collected on filters. The filters were analyzed by Scanning Electron Microscopy and Energy Dispersive X-Ray analysis (SEM-EDX) to investigate single or ensembles of particles regarding composition and possible origins.The analyses showed up to 8.3 per cent being phytoliths in the emitted dust and up to 25 per cent of organic origin. Particles of organic origin are mostly in the coarse dust fraction, whereas phytoliths are predominately transported in the finer dust fractions. Since phytoliths are both an important source of Si as a plant nutrient and are also involved in soil C fixation, their losses from arable land via dust emissions should be considered and its specific influence on atmospheric processes should be studied in detail in the future.

Updated data on Litopterna from the Huayquerian Stage/Age (Late Miocene-Early Pliocene) of central-east Argentina

Hitherto, only the Proterotheriidae Ameghino, 1887 litopterns from the Cerro Azul Formation (Chasicoan-­Huayquerian Stages/Ages; Late Miocene-Early Pliocene) in La Pampa Province had been studied, recognizing Proterotheriidae indet. at Cerro La Bota, Diplasiotherium pampa Soria, 2001 at several localities,

248.1: Hepatitis B virus Status of Organ Donors in Argentina

Background & Aims: Argentina is considered an area of a low prevalence of hepatitis B virus (HBV). However, the real prevalence of the disease is unknown. We aimed to study the prevalence of HBV in potential cadaveric donors. Methods: We performed a cross-sectional study to analyze data from the National Procurement of Transplantation (INCUCAI) in Argentina from 2006 to 2020. We included data from all donors, including tissue only, effective donors (those for whom transplantation was effectively done), and non-effective donors. HBV serologic tests included hepatitis B virus antigen (HBsAg), core antigen-antibody (HBcIgG), anti-HBs. These tests were performed on all donors during the procurement process. HBV status was defined as 1) active HBV: donors with positive HBsAg; 2) Past HBV infection or false positive: isolated positive HBcIgG; 3) Cured infection anti-HBs+/HBcIgG+. Results: Overall, 16140 deceased donors were denounced. Of these, 8627 (53.5%) were organ donors (7802 [90.4%] were effective) and 7513 (46.5%) were tissue donors. Demographic characteristics were age 42 ± 18 years; male/female ratio was 1.59/1. Overall, the prevalence of HBsAg was 0.37% (n=60) and of isolated HBcIgG+ was 3.6% (n=575). Among organ donors only, 328 (3.8%) presented isolated HBcIgG-positive serology. Of these, 252 (77%) were effective organ donors. Solid-organ transplants performed using isolated HBcIgG+ donors were 220 kidneys, 124 livers, and 27 intrathoracic organs. There was not significant 5-year graft and patient survival difference between HBcIgG+ receptor (kidney transplant 65% and 81%, and for liver 65% and 83% respectively) and general population (kidney transplant 67% (p0.58) and 92% (p0.77), and for liver 64% (p0.73) and 80% (p 0.83), respectively). Anti-HBs data were available in only 4455 donors of which 19% (N=847) were anti-HBs+. In those patients with positive anti-HBs, HBcIgG was positive in 8.3% (n=369). reflecting past HBV infection. Of the remaining 4086 AntiS available, only 11.7% were positive, that is, they were effectively vaccinated. The Patagonia region presented the highest prevalence of HBsAg, especially in the provinces of La Pampa (2.3%), Santa Cruz (2.2.%), and Tierra del Fuego (2.1.%). The prevalence ratio of HBsAg? among donors remained stable during the study period. Isolated HBc IgG-positive donors were only used for organ transplantation, among which 77% (252/328) were effective donors. Conclusions: The prevalence of HBsAg in deceased donors in Argentina is low. Since the probability of being a donor is random, the prevalence in this population could be close to the real one in the country.

Dietary ecology of two migrant flycatchers in habitats with and without cattle during the breeding season in central Argentina

Food selection is a key aspect of a bird's life history strategy, so understanding how birds respond to variation in food abundance is relevant to evaluating their general ecology and survival, and also the potential consequences of the degradation of environments impacted by livestock. We studied the dietary ecology of Vermilion Flycatchers (VEFL) and Fork-tailed Flycatchers (FTFL), two insectivores and Neotropical austral migrants, during their breeding season. We worked in areas with and without cattle ranching in the Espinal biome of La Pampa, Argentina. We found different arthropod prey abundance for both flycatchers according to arthropod orders and/or study sites, suggesting that livestock may impact food abundance. Both consumed similar prey and positively selected for hymenopterans and coleopterans, and FTFL also positively selected for orthopterans. VEFL selected nest sites with a lower abundance of heteropterans and FTFL selected sites with a higher abundance of coleopterans. Additionally, VEFL nest survival was negatively related to the abundance of hemipterans and FTFL nest survival was positively related to the abundance of coleopterans. This study helps fill gaps on the general ecology of species that breed in rangelands, and highlights the importance of similar studies to formulate effective conservation planning for the Espinal biome.

Tolerancia salina y rendimiento pesquero del pejerrey Odontesthes bonariensis (Actinopterygii; Atherinopsidae) en un lago somero de la Argentina

The silverside (Odontesthes bonariensis) is the most important species in Argentine fisheries due to its wide distribution, great demand and supply of fish protein. This species shows a great ecological plasticity; however, there is little research describing its tolerance to salinity in natural conditions. Dam constructions for irrigation, hydroelectric generation and human consumption, in synergy with glacial retraction, cause great instability in certain wetlands located downstream. In Curacó chained lakes, in the Desaguadero basin (La Pampa, Argentina), the environments reach high salinity and can even dry out entirely. During the period 2004-2008, a significant increase in water flows in this region modified its chemical characteristics and favored the development of silverside. In October 2009, water stopped entering into the system and, in 2011, many lakes disappeared. The objective of this work was to analyze the survival and fishing yield of O. bonariensis in a context of environmental tolerance due to the gradual surface decrease and the increase of salts concentration in La Brava shallow lake (37°55’24’’ S - 65°55’18’’ W). Water salinity increased progressively from 7.05 to 59.3 g/L and O. bonariensis was present up to a concentration of 49.9 g/L. Fish size evidenced a virgin population with specimens up to 482 mm of LEst and 7 years of age. High catches per unit of effort (CPUE) in number and biomass were observed, with maximums of 375 fish and 204. 6 kg/night, but these did not exhibit a strong linear correlation with saline concentration. The salinity tolerance observed in O. bonariensis is higher than that reported by other authors and places this freshwater fish among the most euryhaline in the world.

Reperfusion Times in a Telemedicine-guided Program for the Management of ST-segment Elevation Myocardial Infarction in the Province of La Pampa

Background: Timing of medical care is a relevant factor for ST-segment elevation myocardial infarction (STEMI) mortality. Objectives: The aim of the present study is to evaluate reperfusion times in STEMI patients participating in a telemedicine-based cardiology care program in the province of La Pampa between August 2018 and December 2021. Methods: This program consists of a protocol for the management of patients with acute coronary syndrome (ACS) in the different locations of the province, with 24-hour remote assistance provided by cardiologists, including both diagnostic support and coordination of on-site thrombolysis. Results: Of a total of 72 STEMI patients evaluated, 44 received thrombolysis as reperfusion therapy, 25 received primary percutaneous coronary intervention, and 3 received thrombolysis followed by rescue percutaneous coronary intervention. Of the 47 subjects who received thrombolysis, only 5 required to be transferred to the referral center for this procedure. Median door-to-needle time was 24 minutes and door-to balloon-time was 105 minutes. Twenty-eight percent of the subjects with primary percutaneous coronary intervention had a door-to-balloon time < 90 minutes and 53.2% of patients who received thrombolysis fulfilled a door-to-needle time < 30 minutes. Conclusions: The implementation of a telemedicine-guided program for decentralized management of STEMI patients was associated with a high percentage of compliance with the goals of implementing fibrinolytic-based reperfusion therapy