What are the two causes of cyst-like structures in the interventricular septum on echocardiography? An echinococcal cyst or rupture of a Sinus of Valsalva aneurysm into the interventricular septum.

This maneuver will decrease the murmur of HOCM, as the increased left ventricular volume helps displace the hypertrophied interventricular septum, causing less outflow tract obstruction.

Intraventricular contraction delay of HF-RV ... Strain of the apical septum was worse after BV pacing. On the other hand, strain of the basal and mid-lateral wall was improved after BV pacing.