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.
The OâHara watercolor box, measures 11â³ x 16â³ x 1 Â½â and features an enameled palette in a compact metal box. Storage spaces for paint, brushes and other accessories are under the pull out palette. A popular favorite for all plein air painters and art students. Good size for outdoor work.