Figure 2
From: Brain abscesses in a patient with a patent foramen ovale: a case report
Transesophageal echocardiography during the patient's initial hospitalization. (A) A bidirectional interatrial shunt seen through the patent foramen ovale. RA, right atrium; LA, left atrium. (B) Injection of agitated saline through an upper extremity peripheral vein showing the appearance of bubbles crossing from the right to the left atrium. RA, right atrium; LA, left atrium.