A meta-analysis of 3 studies examining CTA for the diagnosis of dissection showed a pooled sensitivity of 100% and a specificity of 98% [21]. When CTA is used as a first-line test, the International Registry of Acute Aortic Dissection reported a sensitivity of 93% for diagnosing dissection [35]. Suspected Acute Aortic Syndrome MRA Chest Without IV Contrast There is no relevant literature supporting the use of MR angiography (MRA) chest without IV contrast for the diagnosis of AAS. Several studies report noncontrast MRA techniques and compare them with contrast-enhanced techniques, but studies were neither blinded to the reference standard or nor did they contain control subjects [36,37]. MRA Chest, Abdomen, and Pelvis Without IV Contrast There is no relevant literature supporting the use of MRA chest, abdomen, and pelvis without IV contrast for the diagnosis of AAS. Although no literature directly examines the accuracy of diagnosing AAS with MRA chest, abdomen, and pelvis without IV contrast, the accuracy for identification of an AD in the chest is similar to that of an isolated MRA chest without IV contrast with the addition of MRA abdominal and pelvic assessment. MRA Chest, Abdomen, and Pelvis Without and With IV Contrast There is no relevant literature supporting the use of MRA chest, abdomen, and pelvis without and with IV contrast for the diagnosis of AAS. Although no literature directly examines the accuracy of diagnosing AAS with MRA chest, abdomen, and pelvis without IV contrast, the accuracy for identification of an AD in the chest is similar to that of an isolated MRA chest without IV contrast with the addition of MRA abdominal and pelvic assessment. MRI Chest, Abdomen, and Pelvis Without IV Contrast There is no relevant literature supporting the use of MRI chest, abdomen, and pelvis without IV contrast for the diagnosis of AAS.
Suspected Acute Aortic Syndrome. A meta-analysis of 3 studies examining CTA for the diagnosis of dissection showed a pooled sensitivity of 100% and a specificity of 98% [21]. When CTA is used as a first-line test, the International Registry of Acute Aortic Dissection reported a sensitivity of 93% for diagnosing dissection [35]. Suspected Acute Aortic Syndrome MRA Chest Without IV Contrast There is no relevant literature supporting the use of MR angiography (MRA) chest without IV contrast for the diagnosis of AAS. Several studies report noncontrast MRA techniques and compare them with contrast-enhanced techniques, but studies were neither blinded to the reference standard or nor did they contain control subjects [36,37]. MRA Chest, Abdomen, and Pelvis Without IV Contrast There is no relevant literature supporting the use of MRA chest, abdomen, and pelvis without IV contrast for the diagnosis of AAS. Although no literature directly examines the accuracy of diagnosing AAS with MRA chest, abdomen, and pelvis without IV contrast, the accuracy for identification of an AD in the chest is similar to that of an isolated MRA chest without IV contrast with the addition of MRA abdominal and pelvic assessment. MRA Chest, Abdomen, and Pelvis Without and With IV Contrast There is no relevant literature supporting the use of MRA chest, abdomen, and pelvis without and with IV contrast for the diagnosis of AAS. Although no literature directly examines the accuracy of diagnosing AAS with MRA chest, abdomen, and pelvis without IV contrast, the accuracy for identification of an AD in the chest is similar to that of an isolated MRA chest without IV contrast with the addition of MRA abdominal and pelvic assessment. MRI Chest, Abdomen, and Pelvis Without IV Contrast There is no relevant literature supporting the use of MRI chest, abdomen, and pelvis without IV contrast for the diagnosis of AAS.