Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Rezende's classification. Grade I - esophageal hypotonia and gastric air bubble (asterisk). Grade II - moderately dilated esophagus and tertiary waves (arrowheads). Grade III - esophageal dilation and "bird beak" sign of the gastric cardia (arrow); tertiary waves are present, but less frequently. Grade IV - akinesis and dolicomegaesophagus, with the "bird beak" sign of the gastric cardia (arrow).
