Detection of left coronary artery stenosis by transoesophageal echocardiography

Area of Science:

• Cardiovascular Imaging
• Echocardiography
• Interventional Cardiology

Background:

• Coronary artery disease (CAD) diagnosis relies heavily on invasive angiography.
• Non-invasive imaging modalities are sought to improve CAD detection and risk stratification.
• Transesophageal echocardiography (TEE) offers a unique vantage point for visualizing cardiac structures.

Purpose of the Study:

• To evaluate the efficacy of transesophageal echocardiography (TEE) in visualizing the left coronary artery system.
• To assess TEE's capability in detecting stenosis in patients with known left coronary artery disease.

Main Methods:

• Retrospective analysis of TEE in 60 patients without coronary artery disease to assess visualization rates.
• Prospective study of TEE in 23 patients with angiographically confirmed left coronary artery disease.
• Comparison of TEE findings with coronary angiography for stenosis assessment.

Main Results:

• The left main coronary artery was visualized in 56/60 patients retrospectively and 23/23 prospectively.
• The proximal circumflex artery was visualized in 34/60 patients retrospectively and 23/23 prospectively.
• TEE correctly diagnosed stenosis in 18/23 patients with left main or circumflex artery stenosis, with overestimation in 5 patients.

Conclusions:

• Transesophageal echocardiography demonstrates significant potential for visualizing and assessing stenosis in the left main and circumflex coronary arteries.
• TEE may serve as a valuable non-invasive tool for detecting or excluding stenosis in these specific coronary segments.
• Further refinement and validation are warranted for broader clinical application in coronary artery disease assessment.