Classification of Acute Aortic Syndrome Classification of AAS is based on identifying the location of the most proximal location of the intimal flap and/or IMH. In DeBakey classification type I and type II ADs, the proximal intimal tear is located in the ascending aorta, usually just a few centimeters above the aortic valve. In type I dissection, the intimal flap extends for a variable distance beyond the aortic arch and usually into the descending aorta, whereas in type II the intimal flap is confined to the ascending aorta. DeBakey type III dissection originates in the descending aorta, usually just beyond the origin aUniversity of Washington, Seattle, Washington. bPanel Chair, Duke University Medical Center, Durham, North Carolina. cPanel Vice-Chair, Massachusetts General Hospital, Boston, Massachusetts. dUniversity of Louisville School of Medicine, Louisville, Kentucky. eUniversity of Michigan Health System, Ann Arbor, Michigan. fThe University of Chicago Medical Center, Chicago, Illinois; American College of Physicians. gKaiser Permanente, Los Angeles, California. hVancouver General Hospital, Vancouver, British Columbia, Canada. iUniversity of California San Diego, San Diego, California. jHarvard Medical School, Boston, Massachusetts. kSentara Norfolk General/Eastern Virginia Medical School, Norfolk, Virginia; American College of Emergency Physicians. lNaval Medical Center Portsmouth, Portsmouth, Virginia. mMassachusetts General Hospital, Boston, Massachusetts. nOhio State University, Nationwide Children's Hospital, Columbus, Ohio; Society for Cardiovascular Magnetic Resonance. oUniversity of Virginia Health Center, Charlottesville, Virginia; Society of Cardiovascular Computed Tomography. pAscension Healthcare Wisconsin, Milwaukee, Wisconsin; Nuclear cardiology expert. qSpecialty Chair, UT Southwestern Medical Center, Dallas, Texas.
Suspected Acute Aortic Syndrome. Classification of Acute Aortic Syndrome Classification of AAS is based on identifying the location of the most proximal location of the intimal flap and/or IMH. In DeBakey classification type I and type II ADs, the proximal intimal tear is located in the ascending aorta, usually just a few centimeters above the aortic valve. In type I dissection, the intimal flap extends for a variable distance beyond the aortic arch and usually into the descending aorta, whereas in type II the intimal flap is confined to the ascending aorta. DeBakey type III dissection originates in the descending aorta, usually just beyond the origin aUniversity of Washington, Seattle, Washington. bPanel Chair, Duke University Medical Center, Durham, North Carolina. cPanel Vice-Chair, Massachusetts General Hospital, Boston, Massachusetts. dUniversity of Louisville School of Medicine, Louisville, Kentucky. eUniversity of Michigan Health System, Ann Arbor, Michigan. fThe University of Chicago Medical Center, Chicago, Illinois; American College of Physicians. gKaiser Permanente, Los Angeles, California. hVancouver General Hospital, Vancouver, British Columbia, Canada. iUniversity of California San Diego, San Diego, California. jHarvard Medical School, Boston, Massachusetts. kSentara Norfolk General/Eastern Virginia Medical School, Norfolk, Virginia; American College of Emergency Physicians. lNaval Medical Center Portsmouth, Portsmouth, Virginia. mMassachusetts General Hospital, Boston, Massachusetts. nOhio State University, Nationwide Children's Hospital, Columbus, Ohio; Society for Cardiovascular Magnetic Resonance. oUniversity of Virginia Health Center, Charlottesville, Virginia; Society of Cardiovascular Computed Tomography. pAscension Healthcare Wisconsin, Milwaukee, Wisconsin; Nuclear cardiology expert. qSpecialty Chair, UT Southwestern Medical Center, Dallas, Texas.