- In the presence of a "hyperdominant" LAD continuing as PDA, the entire interventricular septum
is perfused by the LAD and its occlusion can lead to catastrophic consequences.
 Research conducted by Ganame et al  on cohort of 56 children who had received anthracycline treatment up to 15 years also established regional decrease in TDI-derived longitudinal strain in the interventricular septum
and LV lateral wall.
Lack of this knowledge may lead to incomplete revascularization of the anterolateral wall or the interventricular septum
. The presence of short LAD can be mistaken for total mid-LAD occlusion.
The anterior (top in image) leaflet of the mitral valve is not seen within 1 cm of the interventricular septum
. The left atrium is clearly larger in diameter than the aortic root.
Caption: Figure 1: Transthoracic echocardiogram modified apical 4-chamber view showing a large mass in the right ventricle and atrium measuring 7.7 x 3.8 cm and another mass in the left ventricle attached to interventricular septum
measuring 1.5 x 1.3 cm.
In patients with PH the echocardiographic examination may show dilatation of the pulmonary artery, hypertrophy and enlargement of the right ventricle, rectified interventricular septum
with paradoxical movement, systolic dysfunction of the right ventricle, right atrium dilatation and decreased right ventricle lumen (Figure 2C e 2D).
The location of AMI involving a small (<2 cm) area of the midbasal interventricular septum
may be overlooked in the ECG in terms of ST-segment elevation, showing only an isolated QS complex on V1 and V2 with a small R wave.
His echo showed 1cm ventricular septal rupture (VSR) located over anteoinferior segment of interventricular septum
. Angiography showed left anterior descending artery having 80% stenosis.
Caption: Figure 4: Axial cardiac computed tomography images at the level of the interventricular septum
and base of the heart (a) showing fatty infiltration of the right ventricular side of the septum extending into the adjacent trabeculae (red arrow).
The ECG recorded (Figure 1) suggests ventricular tachycardia originating in the right ventricle or in the interventricular septum
. The patient was treated with synchronized direct current cardioversion and regained sinus rhythm.
Caption: FIGURE 2: Transesophageal echocardiogram mid-esophageal position demonstrating a 1.3 by 1.0 cm mass (red arrow) attached to the interventricular septum
in the left ventricular outflow tract during diastole.