Early one morning last May, a commercial airliner was approaching El Paso International Airport, in West Texas, when warning popped up the cockpit: “GPS Position Lost.” The pilot contacted airline's operations center and received report that U.S. Army's White Sands Missile Range, South Central New Mexico, disrupting GPS signal. “We knew then it not an aircraft fault,” wrote later.

STUDY OBJECTIVES This study examines the relevance of self-reported morning and evening chronotypes in treatment-seeking insomniacs presenting to a tertiary sleep clinic setting. DESIGN Using a cross-sectional design, patients were categorized as morning, intermediate, and evening chronotypes based upon scores on the Morningness-Eveningness Composite Scale (MECS). Group comparisons were made ...

Recent clinical studies demonstrated that an exaggerated morning blood pressure (BP) surge is a risk for cardiovascular events, such as ischemic and hemorrhagic stroke.1–3 Simultaneously, neurohumoral factors and various cardiovascular risk factors are exaggerated in the morning. Although the precise molecular mechanisms remain unclear, exaggerated morning BP surge has been closely associated w...

There are variations in the onset of cardiovascular events. As diurnal variation, most studies have shown an increased incidence of acute cardiovascular events such as acute myocardial infarction, sudden cardiac death, and stroke in the morning.1 In addition, weekly and seasonal variations in the cardiovascular events have also been reported.2 These variations may be closely associated with amb...

purpose: to report the characteristics of children referred to the emergency department of feiz medical center with penetrating eye injuries. methods: in a cross-sectional study, children with penetrating eye trauma were evaluated. age, sex, parents educational level, time, location, and cause of trauma recorded and compared. results: overall, 100 patients with mean age of 7±3.8 (range 2 to 16 ...

Is the Atherosclerotic Risk of Extreme Dipping in Youth Partly Explained by Exaggerated Morning Surge? To the Editor: I have read the article by Viera et al demonstrating that disrupted circadian rhythm of blood pressure (BP) in youth was a predictor of coronary calcium levels in younger adults. The study is of great interest because, although an association between normotensive nondippers and ...