Clinical utility of echocardiography in secondary ischemic stroke prevention

Area of Science:

• Cardiology
• Neurology
• Medical Imaging

Background:

• Echocardiography uses ultrasound to assess heart function and structure.
• Its clinical utility in secondary ischemic stroke prevention hinges on identifying specific, actionable cardiac pathologies.

Purpose of the Study:

• To evaluate the diagnostic yield and cost-effectiveness of echocardiography in secondary ischemic stroke prevention.
• To determine optimal echocardiographic modalities for detecting therapeutically relevant findings.

Main Methods:

• Review of echocardiographic modalities including transthoracic echocardiography (TTE) and transesophageal echocardiography (TEE).
• Analysis of findings such as intracardiac thrombus, valvular heart disease, and patent foramen ovale (PFO).
• Comparison of diagnostic accuracy and cost-effectiveness of different echocardiographic techniques.

Main Results:

• Echocardiography has a low yield in unselected stroke patients and is not cost-effective.
• Therapeutically relevant findings (e.g., thrombus, valvular disease) are often linked to clinical signs of cardiac disease.
• TEE is generally more sensitive than TTE for most relevant pathologies, except PFO detection where TTE with agitated saline is comparable.

Conclusions:

• Echocardiography is clinically valuable for secondary stroke prevention only when specific, therapeutically actionable cardiac conditions are suspected.
• Cost-effectiveness studies suggest selecting the most sensitive modality (often TEE) as the initial test, contrary to some professional society recommendations favoring TTE.
• The choice of echocardiographic modality should be guided by the suspected pathology and cost-benefit analysis.