Dynamic left ventricular outflow tract obstruction in senile cardiac amyloidosis.

Dynamic left ventricular outflow tract (LVOT) obstruction is classically seen in hypertrophic obstructive cardiomyopathy (HOCM). This can also be seen in cardiac amyloidosis. We describe a rare case of senile systemic amyloidosis with dynamic LVOT obstruction and concomitant three vessel coronary artery disease presenting with clinical and echocardiographic findings similar to those seen in HOCM. We also highlight the importance of distinguishing the sub-types of amyloidosis so that the appropriate therapy can be offered to patients with cardiac involvement, including coronary artery bypass grafting and septal myotomy/myectomy to relieve LVOT obstruction in the more benign forms of cardiac amyloidosis.