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.
Vertical tortuous ductus arteriosus and tortuosity index measurements are seen in the lateral angiographic view of the tetralogy of Fallot with pulmonary atresia in a cyanotic newborn baby. Length 1 (L1) indicates the actual length of the curved ductus. Length 2 (L2) is the shortest distance between the ductus arteriosus ampulla and the pulmonary entry point.
