The aortic valve is situated between the left ventricle and aorta. Narrowing of the valve orifice is known as aortic stenosis. The narrowing of the valve could be due to a birth defect or acquired. The common acquired causes are rheumatic or degenerative. In children balloon dilatation of the aortic valve is a good treatment option, but in adults surgery is the treatment of choice. Balloon dilatation in adults is done only in individuals who are high risk for surgery as a palliative measure. During balloon aortic valvotomy a balloon is placed across the stenotic aortic valve and dilated. To stabilize the balloon during inflation the heart is paced at a rate of 200 to 250 beats per minute.
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jtheywood 1 year ago