Which of the following diagnostic procedures can visualize internal cardiac structures?

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Transesophageal echocardiography is a diagnostic procedure that uses an ultrasound probe passed down the esophagus to visualize the internal structures of the heart. This provides a more detailed view than a standard echocardiogram and can be especially useful for detecting abnormalities in the atria or valves. The other options (intravascular thrombolytic therapy, stress test, and electrocardiography) are not imaging procedures and do not visualize internal cardiac structures.

Which of the Following Diagnostic Procedures Can Visualize Internal Cardiac