Why the study?
Does a balloon-to-annulus ratio > 1.0 improve pulmonary valve gradients and reduce restenosis compared to a ratio <= 1.0 in patients undergoing balloon dilatation of the pulmonary valve?
Does a balloon-to-annulus ratio > 1.0 improve pulmonary valve gradients and reduce restenosis compared to a ratio <= 1.0 in patients undergoing balloon dilatation of the pulmonary valve?
Balloon dilatation of the pulmonary valve using a balloon-to-annulus ratio of 1.2 to 1.5 provides the most sustained relief of pulmonary stenosis while avoiding the risks associated with excessively oversized balloons.
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May support balloon/annulus ratios >1.0 for lower gradients after pulmonary valve dilatation; hypothesis-generating and requires prospective confirmation.
P. Syamasundar Rao (1988) studied this question.
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