Transesophageal echocardiography in the etiologic diagnosis of stroke

Area of Science:

• Cardiology
• Neurology
• Medical Imaging

Background:

• Cardioembolic phenomena account for a significant portion of cerebral infarctions.
• Traditional cardiac diagnostic methods like transthoracic echocardiography and Holter monitoring have limited sensitivity for detecting cardioembolic sources.
• Accurate diagnosis of cardioembolic stroke is often challenging due to these limitations.

Purpose of the Study:

• To evaluate the diagnostic yield of transesophageal echocardiography in identifying cardiac abnormalities responsible for brain embolism.
• To compare the sensitivity of transesophageal echocardiography with transthoracic echocardiography for specific cardiac findings.

Main Methods:

• Review of published series comparing transesophageal echocardiography and transthoracic echocardiography.
• Focus on the detection of intracardiac thrombi, mitral valve prolapse, and left atrial spontaneous contrast.
• Assessment of abnormalities in the left atrium, left atrial appendage, and atrial septum.

Main Results:

• Transesophageal echocardiography demonstrates increased sensitivity in detecting cardiac abnormalities that cause brain embolism.
• Specific findings like left atrial disease, left atrial appendage issues, and atrial septum abnormalities are better visualized.
• The technique shows higher sensitivity for intracardiac thrombi and mitral valve prolapse compared to transthoracic echocardiography.

Conclusions:

• Transesophageal echocardiography is a valuable tool for improving the diagnosis of cardioembolic stroke.
• It offers superior sensitivity over traditional methods for identifying key cardiac sources of embolism.
• Enhanced visualization of specific cardiac structures improves diagnostic certainty in cardioembolic stroke cases.