Ross procedure [SEP] named after
Ross procedure
The Ross procedure (or pulmonary autograft) is a cardiac surgery operation where a diseased aortic valve is replaced with the person's own pulmonary valve. A pulmonary allograft (valve taken from a cadaver) is then used to replace the patient's own pulmonary valve. Pulmonary autograft replacement of the aortic valve is the operation of choice in infants and children, but its use in adults remains controversial.
History.
The Ross procedure is named after Dr. Donald Ross - a pioneer in cardiac surgery in the UK
Vasconcelos stepped down, the SEP got its radio station. A transmitter was bought from WEAF in New York and installed on the third floor of the SEP's building. Joaquín Beristáin was charged with designing the first program lineup.
On November 30, 1924, the SEP station began formal operations under the callsign CYE, which was changed within a matter of days to CZE. The station broadcast on 560 kilohertz with 500 watts. María Luisa Ross was the station's first full director, being named on January 1, 1925