55 rule

A clinical guideline used in patients with aortic regurgitation to gauge the timing of surgery, which should be performed when the ejection fraction falls below 55% or before the left ventricle contracts to 55 mm or less.

55 rule

Cardiology A clinical guideline used in Pts with aortic regurgitation to gauge the timing of surgery, which should be performed when the ejection fraction falls below 55%, or before the left ventricle can no longer contract to the end-systolic dimension is > 55 mm or less. See Aortic regurgitation.

单词	55 rule
释义	55 rule 55 rule A clinical guideline used in patients with aortic regurgitation to gauge the timing of surgery, which should be performed when the ejection fraction falls below 55% or before the left ventricle contracts to 55 mm or less. 55 rule Cardiology A clinical guideline used in Pts with aortic regurgitation to gauge the timing of surgery, which should be performed when the ejection fraction falls below 55%, or before the left ventricle can no longer contract to the end-systolic dimension is > 55 mm or less. See Aortic regurgitation.
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