Aneurysm of the right sinus of Valsalva dissecting into the interventricular septum.

<p>The long-axis view of the left ventricle shows the aneurysm (arrow) extending into the interventricular septum and communicating with it through the aneurysmal defect (★), changing with systolic collapse (A) and diastolic expansion (B). CDFI reveals the to-and-fro flow at the site of the perforation of the aneurysm (C, D). The short-axis view of the aortic root shows that the aneurysm (arrow) originated from the right coronary sinus and communicated with the dissection (E). The left ventricular short-axis view shows the characteristic change in the area of the myocardial dissection and obstruction of the right ventricular outflow tract during diastole (F, G). The apex five-chamber view shows severe aortic regurgitation (H). AO: aorta; D: dissection; LA: left atrium; LV: left ventricle; LVOT: left ventricular outflow tract; PA: pulmonary artery; PE: pericardial effusion; RV: right ventricle