Sperm in the first fraction of ejaculate are more numerous, move more and present better quality DNA than those lagging behind. This is the conclusion of a study that confirms that while the objective ...

Ejection fraction refers to how much blood the heart pumps out during a contraction. An abnormal ejection fraction can be a sign of heart failure. Some people might need treatment to improve their ...

This Journal feature begins with a case vignette highlighting a common clinical problem. Evidence supporting various strategies is then presented, followed by a review of formal guidelines, when they ...

Fractions are the basis for most higher-level mathematics. Students need to master the numerical values in earlier grades to tackle topics like algebra later. There’s only one hitch: Fractions can ...

Is your heart functioning properly? There is a test which can measure this, which is often recommended by medical professionals. Ejection fraction (EF) is a measurement, expressed as a percentage, of ...

Have you tried entering a fraction into your Excel sheet, only to have it convert to a serial, whole, or decimal number when you press Enter, and you have no clue what to do? In Microsoft Excel, you ...

Nitrates are commonly prescribed to enhance activity tolerance in patients with heart failure and a preserved ejection fraction. We compared the effect of isosorbide mononitrate or placebo on daily ...