A answered. Atrial fibrillation can be caused by a number of different things that predispose the heart to arrhythmias. Most commonly, longstanding high blood pressure is the cause. Other causes include heart disease such as blockage in the coronary vessels or diseases such as pneumonia or COPD.
Definition: When an artist deliberately restricts the number of colors they use in a painting, they're said to be using a limited palette. (A palette being what paints are squeezed out onto, ready for use.). Also Known As: Restricted palette.
Narmer's Palette was not meant for actual use. Rather it is a votive, or ritual object, a gift to a god or goddess that was placed in a temple to ensure that the king or perhaâ¦ps some temple official would have access to the palette throughout eternity.