Among imaging options for suspected aortic dissection, which is most commonly performed in the ED due to being less invasive?

Among imaging options for suspected aortic dissection, which is most commonly performed in the ED due to being less invasive?

• A. Aortography
• B. MRI
• C. Transesophageal echocardiography
• D. CT with contrast

Answer: (D)

CT angiography with intravenous contrast is the imaging test of choice in the ED for suspected aortic dissection because it is quick, widely available, and noninvasive compared with catheter-based studies. It can be performed rapidly in most emergency departments, provides high-resolution, full-length visualization of the aorta to identify the intimal tear, distinguish true versus false lumen, and assess branch vessel involvement, all of which are essential for immediate management decisions. In contrast, aortography requires arterial catheterization and carries more invasive risks; MRI offers excellent detail but is slow and not as practical in the acute ED setting; transesophageal echocardiography is semi-invasive, operator-dependent, and may miss certain portions of the aorta. Thus, CT with contrast best balances speed, accessibility, and diagnostic accuracy for initial ED evaluation.

CT angiography with intravenous contrast is the imaging test of choice in the ED for suspected aortic dissection because it is quick, widely available, and noninvasive compared with catheter-based studies. It can be performed rapidly in most emergency departments, provides high-resolution, full-length visualization of the aorta to identify the intimal tear, distinguish true versus false lumen, and assess branch vessel involvement, all of which are essential for immediate management decisions. In contrast, aortography requires arterial catheterization and carries more invasive risks; MRI offers excellent detail but is slow and not as practical in the acute ED setting; transesophageal echocardiography is semi-invasive, operator-dependent, and may miss certain portions of the aorta. Thus, CT with contrast best balances speed, accessibility, and diagnostic accuracy for initial ED evaluation.