Transoesophageal echo-Doppler in patients suspected of a cardiac source of peripheral emboli

Area of Science:

• Cardiology
• Diagnostic Imaging
• Vascular Medicine

Background:

• Peripheral emboli can originate from various sources, including the heart.
• Accurate identification of cardiac sources is crucial for appropriate patient management and treatment.
• Transoesophageal echo-Doppler (TOE) is a non-invasive imaging technique used to visualize cardiac structures.

Purpose of the Study:

• To evaluate the diagnostic accuracy of transoesophageal echo-Doppler in identifying cardiac sources of peripheral emboli.
• To determine the sensitivity, specificity, and predictive values of TOE in a suspected embolism population.

Main Methods:

• A controlled, partly blinded study involving 120 consecutive patients with suspected acute embolic events.
• Patients were categorized into definite non-embolic (controls), questionable, and cardiac embolism groups.
• Transoesophageal echo-Doppler was performed to assess for cardiac abnormalities.

Main Results:

• Transoesophageal echo-Doppler demonstrated a sensitivity of 83% and specificity of 86% for detecting cardiac sources.
• Positive predictive value was 80%, and negative predictive value was 87%.
• Common cardiac conditions like atrial septal defects and mitral valve prolapse were not significantly different between groups.

Conclusions:

• Transoesophageal echo-Doppler is a highly sensitive and specific tool for diagnosing cardiac sources of peripheral emboli.
• The findings support the utility of TOE in the etiological investigation of embolic events.
• This imaging modality aids in differentiating cardiac from non-cardiac causes of embolism.