International Thoracic Organ Transplant (TTX) Registry

TTX Registry Steering Committee

Five people posing for a photo at ISHLT2023 in Denver

The TTX Registry Steering Committee is responsible for the oversight of the registry's operation and monitoring its ongoing progress.

Data Coordinating Center

The Data Coordinating Center (DCC) for the TTX Registry is the United Network for Organ Sharing (UNOS). UNOS hosts the database and manages the collection and analysis of the data. Questions about the TTX Registry and the data submission process may be directed to

The International Thoracic Organ Transplant (TTX) Registry was created to provide on-going, current data regarding patient, donor, and transplant characteristics as well as post-transplant outcomes.  Our Registry is the only one of its kind.  All institutions and countries performing heart, heart-lung, and/or lung transplantation are invited to submit data to the TTX Registry.
Participating Registry Partners

As of early 2019, 45 centers have submitted data using our secure web-based data entry system, and 345 centers have participated through data sharing with the following Registry Partners:

The list of participating collectives will be updated after the Registry relaunch in late 2021.

Registry Resources