Ejection fraction (EF) measures the amount of blood pumped out of your heart's lower chambers, or ventricles. It's the percentage of blood that leaves your ventricle when your heart contracts. The ...

End-diastolic volume is the amount of blood that is in the ventricles before the heart contracts. Doctors use end-diastolic volume to estimate the heart’s preload volume and to calculate stroke volume ...

A fraction is part of a whole. The whole can be a shape, a length, a number or a set of objects. Fractions are always divided into equal parts. A half is one of two equal parts that together make a ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Hey mathematicians! My name's Ms Szalek and welcome to maths. Today we're going to focus on fractions.

An astronomy expert has said the recent image released by the James Webb Space Telescope represents a mere fraction of what the telescope is capable of. On Monday, the scientific community and the ...

A fraction is part of a whole that has been divided into equal parts. Fractions represent more than 0 but less than 1. Fractions are written with two numbers, one on top of the other, separated by a ...