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.
Defining Non-Objective Art. Quite often, non-objective art is used as a synonym for abstract art. However, it is actually a style within the category of abstract work and the subcategory of non-representational art. Representational art is designed to represent real life and non-representational art is the opposite.