Transthoracic and Transesophageal Echocardiography
Transthoracic echocardiography (TTE) examinations were performed with a
commercially available machine (IE33 or EpiQ CVx, Philips Medical
System, USA) ultrasound system equipped with a 2- to 3.5-MHz transducer
in the left lateral decubitus position. On top of conventional echo
measurements, AR severity was evaluated comprehensively and graded in 3
grades (mild, moderate, severe) in accordance with the guidelines of the
American Society of Echocardiography (12) (13). The study subjects of
this study were those with moderate or severe AR. In addition, after a
consent form of TEE was obtained
from every patient, TEE was performed with a transducer (X7-2t or X8-2t)
for further evaluation of AR within 3 months after the TTE examination.
2D and 3D TEE grayscale and color images were acquired at the level of
the aortic valve and root in all the patients. All images were stored
digitally and transferred onto a dedicated image server for subsequent
review.