What is the primary diagnostic tool for acute aortic dissection?

Computed Tomography (CT) is the primary diagnostic tool for acute aortic dissection due to its speed and accuracy in imaging. CT scans can quickly provide detailed cross-sectional images of the aorta, allowing clinicians to assess the presence of a dissection, the extent of damage, and any involvement of branch vessels. With the use of contrast enhancement, CT can clearly delineate between the true and false lumens of the aorta, which is crucial for diagnosing the type and severity of the dissection.

The rapidity of obtaining CT images makes it particularly advantageous in emergency situations where timely diagnosis can significantly impact patient outcomes. The ability to visualize the entire aorta also aids in the identification of any complications that may arise from the dissection.

Other imaging modalities, while useful, may not match the CT's efficiency or precision in emergency settings. For example, ultrasound can be utilized, especially in unstable patients or in a point-of-care setting, but it may not provide the comprehensive view needed to fully assess aortic dissection. Cardiac angiography can help in evaluating aortic lesions, but it is more invasive and time-consuming compared to CT. Standard X-rays are often insufficient for diagnosing aortic dissection as they only provide limited information regarding the a