Study Protocol and Mission for the Tohoku Registry of Acute Aortic Dissection (TRAD).

Background: Acute aortic dissection (AAD) is a life-threatening condition that imposes a significant socioeconomic burden on society. The Tohoku Registry of Acute Aortic Dissection (TRAD) is a collaboration of 13 tertiary referral hospitals in the Tohoku region of Japan designed to investigate all aspects of AAD treatment in this district, and to address significant clinical questions to help understand its dynamic pathology and develop optimal strategies for treating AAD.

Methods and results: Comprehensive cases developing type A and type B AAD, including those with prehospital cardiopulmonary arrest transported to TRAD centers, over 5 years from 2017 to 2022 are registered. The TRAD dataset encompasses prehospital information, diagnostic imaging findings, treatment modalities, and outcomes for each case. After discharge, patients will be followed up for 10 years for survival, aortic events and inspection data.

Conclusions: We believe that this multicenter registry of AAD analyses will clarify the current short-term outcomes of recent surgical, endovascular, and medical treatments in the Tohoku region, and provide insights into the long-term outcomes of different treatment modalities to achieve extended life expectancy in reasonably good health.