BACKGROUND The frequency of acute myocardial infarction (AMI) peaks on Mondays and in the mornings. However, the distribution of the types of acute coronary syndromes (ACS), including unstable angina (UA), has not been systematically evaluated. HYPOTHESIS The distribution of the types of ACS and clinical presentations varies by time and day of admission. METHODS A retrospective cohort study...

INTRODUCTION Differences in after-hours capability or performance of ST-elevation myocardial infarction (STEMI) centers has the potential to impact outcomes of patients presenting outside of regular hours. METHODS Using a prospective observational study, we analyzed all 1,247 non-transfer STEMI patients treated in 15 percutaneous coronary intervention (PCI) facilities in Dallas, Texas, during...

BACKGROUND Despite wide dissemination, use of automated external defibrillators (AEDs) in community settings is limited. We assessed how AED accessibility affected coverage of cardiac arrests in public locations. METHODS AND RESULTS We identified cardiac arrests in public locations (1994-2011) in terms of location and time and viewed them in relation to the location and accessibility of all A...

BACKGROUND AND PURPOSE Studies have demonstrated differences in clinical outcomes in adult patients with stroke admitted on weekdays versus weekends. The study's objective was to determine whether a weekend impacts clinical outcomes in children with ischemic stroke and hemorrhagic stroke. METHODS Children aged 1 to 18 years admitted to US hospitals from 2002 to 2011 with a primary discharge d...

Since the scheduling of sports leagues involves many kinds of constraints and the minimization of costs or travel distances, sports scheduling has become a very active field, providing both interesting and challenging problems to the combinatorial optimization community. In this work we describe the automatic scheduling of the regular phase of the Argentine first division volleyball league and ...

The study is conducted to assess the level of noise pollution from traffic activities in urban areas (in case Thuan An city, Binh Duong province) with specific goal applying geographic information systems. (GIS) building distribution maps area. research team collected data at peak hours and normal on weekdays weekends using meters 61 survey points. Noise measurement was then interpolated IDW (I...

BACKGROUND Management of acute myocardial infarction requires urgent diagnostic and therapeutic procedures, which may not be uniformly available throughout the week. METHODS We examined differences in mortality between patients admitted on weekends and those admitted on weekdays for a first acute myocardial infarction, using the Myocardial Infarction Data Acquisition System. All such admissio...