Use of antegrade or retrograde cerebral perfusion was similar in matched groups. Circulatory arrest times were significantly longer in the MHCA cohort, regardless of matching. The perioperative stroke rate was comparable between groups, before and after propensity matching. For the entire cohort of 1962 patients, in-hospital mortality was 14.2% (278 deaths) but was not significantly different between DHCA and MHCA. The median lowest temperature was 25.0☌ in the matched MHCA group as compared with 18.0☌ in the DHCA group. We then propensity matched 362 pairs of patients and analyzed operative data and short-term outcomes. Data for operative temperature were available for 1962 patients subsequently divided into 2 groups according to lowest temperature: moderate hypothermic circulatory arrest (MHCA) (20-28☌) versus deep hypothermic circulatory arrest (DHCA) (<20☌). We sought to determine the impact of differing degrees of hypothermia in patients undergoing acute dissection repair.Īll patients in the International Registry of Acute Aortic Dissection Interventional Cohort database who underwent type A acute aortic dissection repair between 20 were identified. The optimal strategy for cerebral protection during repair of type A acute aortic dissection has yet to be determined. 12 Department of Cardiothoracic Surgery, Hadassah Hebrew University Medical Center, Jerusalem, Israel.11 Cardiovascular Division, University of Minnesota Physicians Heart Practice, Minneapolis, Minnesota.10 Division of Cardiac Surgery, Toronto General Hospital, Toronto, Ontario, Canada.9 Department of Thoracic & Cardiovascular Surgery, Tromso University Hospital, Tromso, Norway.8 Division of Cardiothoracic Surgery, Emory University, Atlanta, Georgia.7 Department of Cardiology, Robert-Bosch Krankenhaus, Stuttgart, Germany.6 Department of Cardiac Surgery, University Hospital S.5 Department of Scienze Cliniche e di Comunita, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy. ![]() 4 Cardiovascular Center, University of Michigan Health System, Ann Arbor, Michigan.3 Division of Cardiothoracic Surgery, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania.Electronic address: 2 Department of Cardiovascular & Thoracic Surgery, Lenox Hill Hospital/Northwell Health, New York, New York. 1 Department of Cardiovascular & Thoracic Surgery, North Shore University Hospital/Northwell Health, Manhasset, New York.
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