A User-Centered Evaluation of a University Website

Abstract-Usability of a website used to be of very little or no weight at all for the company or academe it represents. With the changing time and increase of Internet users, usability is now a major consideration as website, though virtual, plays an important role for the company or university it represents. This study illustrates the process of assessing a university website. The value of doing usability testing and how it enriches the user experience is presented. Learning about the user and their satisfaction in all aspects of the website is learned through the testing process. A fivephased usability testing methodology is discussed that resulted into qualitative and quantitative data for the researchers study. These data were transformed into information through analysis in accordance to the type of data collected. These findings were then interpreted into concrete website usability assessment. The result showed that the methodology chosen and the test plan it produced was able to output website usability problems that can help assess and greatly improve a university website's usability. Lastly, study recommendations were presented being that usability should be a never ending endeavor for a userconcerned university. Index Terms-human computer interaction, user-centered evaluation, usability testing, user satisfaction, web usability, user-centered desig

Myocardial bridging of the left anterior descending coronary artery is associated with reduced myocardial perfusion reserve:a N-13-ammonia PET study

Myocardial Bridging (MB) refers to the band of myocardium that abnormally overlies a segment of a coronary artery. This paper quantitatively evaluates the influence of MB of the left anterior descending artery (LAD) on myocardial perfusion of the entire left ventricle. We studied 131 consecutive patients who underwent hybrid rest/stress 13N-ammonia positron emission tomography (PET) and coronary computed tomography angiography (CCTA) due to suspected myocardial ischemia. Patients with previous myocardial infarction and/or significant coronary artery disease (≥ 50% stenosis) were excluded. Myocardial perfusion measurements were compared between patients with and without LAD-MB. Additionally, we evaluated the relationship between anatomical characteristics (length and depth) of LAD-MB and myocardial perfusion measurements. 17 (13%) patients presented a single LAD-MB. Global myocardial perfusion reserve (MPR) was lower in patients with LAD-MB than in patients without LAD-MB (1.9 ± 0.5 vs. 2.3 ± 0.6, p < 0.01). Global stress myocardial blood flow (MBF) was similar in patients with and without LAD-MB (2.2 ± 0.4 vs. 2.3 ± 0.7 ml/g/min, p = 0.40). Global rest MBF was higher in patients with LAD-MB than in patients without LAD-MB (1.2 ± 0.3 vs. 1.0 ± 0.2 ml/g/min, p < 0.01). Global rest MBF, stress MBF, and MPR quantifications were similar in patients with superficial and deep LAD-MB (all p = NS). We did not find any correlation between length and global rest MBF, stress MBF nor MPR (r = - 0.14, p = 0.59; r = 0.44, p = 0.07; and r = 0.45, p = 0.07 respectively). Quantitative myocardial perfusion suggests that LAD-MB may be related to impaired perfusion reserve, an indicator of microvascular dysfunction. Anatomical characteristics of LAD-MB were not related to changes in myocardial perfusion

Consenso de la Sociedad Mexicana de Cardiología para el seguimiento clínico cardiovascular post-COVID-19

Antecedentes: Las secuelas cardiovasculares ocasionadas por la enfermedad por coronavirus 2019 (COVID-19) son frecuentes en una importante proporción de los pacientes recuperados del cuadro agudo de la enfermedad. Hasta el día de hoy el seguimiento cardiológico del síndrome agudo post-COVID-19 (SPC-19A) se ha realizado de forma heterogénea y sin directrices que permitan al clínico identificar oportunamente los cambios que preceden a enfermedades cardiológicas derivadas de los distintos mecanismos de daño inducidos por COVID-19. Objetivos: Estandarizar la atención y seguimiento cardiovascular de los supervivientes de COVID-19 en función de la gravedad de la enfermedad e identificar a los pacientes que desarrollen SPC-19A para su atención oportuna. Material y métodos: Mediante una revisión extensa de bibliografía, este documento tiene la intención de unificar y proporcionar la información necesaria para diagnosticar y dar seguimiento a las complicaciones cardiacas que se han documentado en los meses posteriores a la resolución de la COVID-19 aguda