- The study compared the effectiveness of transesophageal echocardiography (TEE) and fluoroscopy for measuring the size of the left atrial appendage (LAA) ostium before occlusion procedures in patients undergoing percutaneous LAAO.
- Out of 195 patients, 185 had both TEE and fluoroscopic measurements; results showed that fluoroscopy estimated a larger ostial diameter, yet TEE measurements correlated better with the size of the implanted device.
- Researchers concluded that while fluoroscopy sizes the LAA ostium larger, TEE is more aligned with device sizing, suggesting that under-sizing can increase the risk of leaks, and further studies should evaluate the routine use of fluoroscopy for this purpose.