The role of echocardiography in cryptogenic stroke: a contemporary review

Area of Science:

• Cardiology
• Neurology
• Medical Imaging

Background:

• Ischemic stroke, especially cryptogenic stroke, necessitates thorough cardiac evaluation due to potential cardiogenic embolism.
• Cardiogenic embolism accounts for 15-30% of ischemic strokes, underscoring the need for cardiac imaging.
• Current guidelines emphasize echocardiography and cardiac monitoring for identifying embolic sources and guiding secondary stroke prevention.

Purpose of the Study:

• To highlight the critical role of echocardiography in evaluating and managing ischemic stroke.
• To discuss the utility of various echocardiographic modalities in identifying cardiac embolic sources.
• To emphasize the integration of echocardiography into a comprehensive cryptogenic stroke diagnostic workup.

Main Methods:

• Review of current guidelines and literature on echocardiography in stroke evaluation.
• Discussion of Transthoracic Echocardiography (TTE) for initial assessment of cardiac structure and function.
• Exploration of Transesophageal Echocardiography (TEE), cardiac CT, and MRI for enhanced visualization of embolic sources like left atrial appendage thrombi and patent foramen ovale (PFO).

Main Results:

• Echocardiography is essential for detecting intracardiac thrombi, valvular abnormalities, and aortic plaques.
• Advanced echocardiographic techniques, including real-time three-dimensional imaging, offer improved visualization.
• A comprehensive approach including brain imaging, neurovascular imaging, ECG, and vascular ultrasound is crucial for cryptogenic stroke diagnosis.

Conclusions:

• Echocardiography is a cornerstone in the diagnostic pathway for ischemic and cryptogenic stroke.
• Advanced cardiac imaging modalities enhance the detection of subtle embolic sources.
• Optimizing echocardiographic evaluation is key to improving stroke prevention and patient outcomes.