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.
Several artists have produced limited edition giclee editions that have literally been repainted over with acrylic paint thus creating a near original numbered graphic. A. Offset Lithography is usually a four color process where the image is photographed and color separations are made for red, yellow, blue and black.