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.
A board, typically with a hole for the thumb, which an artist can hold while painting and on which colors are mixed. 2. a. The range of colors used in a visual medium, in a picture, or by an artist: a limited palette.
Characteristics of Quality Exterior Paint. 1  Hiding power is the ability of the paint to sufficiently cover or conceal the surface where it's applied. Hiding power comes from the paint's pigment and is affected by the manner and thickness of the application. 2  Color retention refers to tinted paints only.