Acute type A aortic dissection (TAAD) persists as a clinicopathologic entity with high lethality in the current era. Several procedures are presently used to repair the TAAAD. The objective of this study is to analyze two groups of individuals using a conservative approach through root-sparing and hemiarch techniques in patients who are hospitalized in higher-risk clinical conditions or more aggressive procedures such as root replacement and total arch replacement in low-risk patients.
Inclusion Criteria: * TAAD or intramural hematoma involving the ascending aorta * Patients aged \> 18 years * Symptoms started within 7 days from surgery * Primary surgical repair of acute TAAD * Any other major cardiac surgical procedure concomitant with surgery for TAAD. Exclusion Criteria: * Patients aged \< 18 years * Onset of symptoms \> 7 days from surgery * Prior procedure for TAAD * Concomitant endocarditis; * TAAD secondary to blunt or penetrating chest trauma.