Influenza A (H1N1pdm09)-related critical illness still predominantly affects relatively young to middle-aged patients and is associated with severe hypoxemic respiratory failure. The local critical care system and available resources may be influential determinants of patient outcome.

Positron-emission tomography (PET) molecular imaging is a medical diagnostic imaging technique that provides biochemical or functional information at the molecular and cellular level of biological processes. Developed in the mid-1970s, it was introduced in Mexico by the Faculty of Medicine of the National Autonomous University of Mexico early in the year 2000, when this institution acquired a cyclotron and a PET camera and created the PET-Cyclotron Unit, thus becoming a PET pioneer in Mexico. PE molecular imaging in MexicoCurrently, in Mexico there are eight cyclotrons in operation (Table 1), half of them in Mexico City, and only two belong to public institutions: the one at the National Autonomous University of Mexico and that of the National Cancer Institute, which started operating in 2017. Regarding PET/computed tomography (CT) cameras, there are already 50 in the country: 21 in Mexico City and the others distributed in the rest of the states (Fig. 1). Ten PET/CT cameras belong to public institutions, two to universities (National Autonomous University of Mexico and Autonomous University of Nuevo León), one to a private assistance institution (Telethon Children's Oncology Hospital, Querétaro) and 37 to private institutions or companies.Almost two decades after having implemented this diagnostic technique in Mexico there have been

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Background Evaluation of acute chest pain (ACP) in the emergency department is a major health issue and differential diagnosis remains challenging for the physician, particularly in patients with atypical symptoms and inconclusive changes in electrocardiogram (ECG) or biomarkers levels. Case summary We present the potential value of the two-phase computed tomography angiography (TP-CTA) imaging protocol done in six different patients evaluated with ACP and underwent non-gated or gated computed tomography angiography (CTA) to exclude pulmonary embolism (PE), acute aortic syndrome (AAS), or acute coronary syndrome (ACS). All patients had new-onset chest pain and atypical clinical presentation with non-diagnostic ECG and initially negative or near-normal cardiac biomarkers. Discussion The evaluation of myocardial computed tomography perfusion (MCTP) using TP-CTA imaging protocol might open a new diagnostic approach to evaluate MCTP in patients with ACP related to PE, AAS, or ACS.

La tomografía por emisión de positrones (PET) es una técnica de diagnóstico médico mediante la cual se obtienen imágenes funcionales a partir de registrar la biodistribución espacio-temporal de radiofármacos específicos dirigidos a blancos moleculares específicos, proveyendo información bioquímica a nivel molecular. A