The codes in CID 12304 “Echo Measured Property” have also proven to be sufficient to encode the ASE Core Set of measurements. It is expected that the majority of vendor-specific or site-specific measurements can also be encoded using these properties, but it is understandable that some additional codes may be needed. When introducing new codes, implementers should be careful not to introduce elements of the other modifiers, such as Finding Site or Cardiac Cycle Point, into the Measured Property. For example, do not introduce a property for Diastolic Atrial Length to be used for the left and right atria, rather for such a measurement, use Property=Length, Cardiac Cycle Point=End Diastole and Finding Site=Left Atrium or Right Atrium respectively.