Video 2

The redundant tip of the mitral valve displays great flexibility and bends back into the LVOT to contact the septum. This is seen with great clarity on ICE films. It is this contact that initiates the positive amplifying feedback cycle leading to significant LVOT gradients. View Video 2 at

Intra-cardiac echocardiography in alcohol septal ablation: a prospective comparative study against trans-thoracic echocardiography

Robert M Cooper, Adeel Shahzad, James Newton, Niels Vejlstrup, Anna Axelsson, Vishal Sharma, OIiver Ormerod, and Rodney H Stables

2015. 2:9-17 DOI: 10.1530/ERP-15-0002