In memoriam

Dr. Gerhard Ziemer
1953 – 2022

We announce with sorrow the sudden passing of our longtime colleague and friend, Gerhard Ziemer.

Gerhard was the Founding President of the European Congenital Heart Surgeons Association and Past President of the Society of Pediatric Cardiovascular Surgery “Aldo R. Castañeda”. Gerhard was also a strong advocate for the establishment of the World Society for Pediatric and Congenital Heart Surgery and was a founding member of its Governing Council.

On behalf of the World Society, we express our sincere condolences to his wife, Sabine and to his family.

Farewell dear friend and esteemed colleague!

— WSPCHS Governing Council

We welcome your participation in a multi-institutional retrospective clinical study of the rare form of d-Transposition of the Great Arteries (d-TGA), with Intact Ventricular Septum (IVS) and Left Ventricular Outflow Tract Obstruction (LVOTO).

[Survey closed ]

Inclusion criteria:
d-TGA, IVS
LVOTO (Fixed, Dynamic or both)

Exclusion criteria:
Presence of a VSD

Time Period:
1992 -2022

Participating Organizations:
ECHSA
WSPCHS
CHSS
AEPC

Principal Investigators:
Vladimiro Vida, Padova, Italy
Christo I. Tchervenkov, Montreal, Canada

TGA, IVS, LVOTO Working Group:
Vladimiro Vida, Padova, Italy
Christo I. Tchervenkov, Montreal, Canada
James D. St. Louis, Augusta, USA
George E. Sarris, Athens, Greece
David M Overman, Minneapolis, USA
James K. Kirklin, Birmingham, USA
Jeffrey P. Jacobs, Gainesville, USA
Claudia Herbst, Vienna, Austria
Andrzej Kansy, Warsaw, Poland
Husain Esmaeil, Montreal, Canada
Alvise Guariento, Padova, Italy
Claudia Cattapan, Padova, Italy

James S. Tweddell, MD
September 2, 1959 – July 1, 2022 

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