One of the most important considerations in the acute management of atrial fibrillation is the need for anticoagulation (see the image below). Acute cardioversion for AF carries a risk of thromboembolism unless anticoagulation therapy is initiated prior to the procedure and continued post procedure.
The glass fibers are made of various types of glass depending upon the fiberglass use. These glasses all contain silica or silicate, with varying amounts of oxides of calcium, magnesium, and sometimes boron.
Hi Glorya, fiberglass composite shingles are actually a type of asphalt shingle. A fiberglass shingle has an outer layer composed of an asphalt composition, and the underneath part of the shingle, which is against the roofing felt on the roof sheathing, is made of a fiberglass matting. An asphalt shingle has the same outer layer, but the underneath matting is of an asphalt organic material.