Which views are important for taking left atrial appendage measurements using TEE?

The short and long axis views are essential for measuring the left atrial appendage (LAA) during transesophageal echocardiography (TEE) because they provide comprehensive information about the LAA's anatomy and dimensions.

In the short axis view, the imaging plane is perpendicular to the long axis of the heart, allowing visualization of the LAA's shape, size, and any potential thrombi or structural abnormalities. This view can effectively capture the circular or ovoid dimensions of the appendage, which is critical for subsequent management decisions, including LAA occlusion procedures.

The long axis view, on the other hand, aligns with the heart's anatomical orientation, granting a clear perspective of the appendage's length and orientation in relation to the rest of the left atrium and structures nearby. This is particularly useful for assessing the risk factors related to stroke and evaluating the suitability of the appendage for occlusion devices.

Thus, using these two views together provides a thorough evaluation of the left atrial appendage, essential for accurate measurement and risk assessment in patients undergoing LAAO interventions.