See below: Some imaging modalities are more sensitive/ accurate. A tee(transesophageal echo) or ct are probably the best means of obtaining an accurate measurement.
Answered 3/18/2013
5.2k views
Document: If different techniques: cta ct mri echo there is some variability. Different sites can be a little different by a millimeter or so. Best is one place, one technique for checking enlargement. 5.5 to 6 centimeters in a good risk patient leads to intervention for ascendingmaneurysm.
Answered 3/18/2013
5.2k views
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