As part of a series “The Clinic – Doctors, Assistants, Diagnoses”, the German television channel Kabel 1 broadcasted an open heart surgery on 07 November 2019. The successful operation was performed with the SIMEON HighLine operating light which impressed with its great light quality.
The entire article can be found:
https://www.kabeleins.de/tv/die-klinik-aerzte-helfer-diagnosen/video/24-eine-neue-herzklappe-operation-von-prof-dr-martens-am-offenen-herzen-in-echtzeit-ganze-folge

Further videos of the series:
https://www.kabeleins.de/tv/die-klinik-aerzte-helfer-diagnosen

Source: Kabel Eins

A short summary about the surgery was also published at bild.de, it is as well the image source:
https://www.bild.de/bild-plus/ratgeber/2019/ratgeber/herz-op-im-fernsehen-das-sagt-der-patient-ueber-die-operation-65881332,view=conversionToLogin.bild.html