one had recurrent ventricular tachycardia , and one had anatomic evidence of aortic regurgitation due to massive periaortic neoplastic infiltration that prevented coaptation of the aortic cusps during ventricular diastole , one had massive invasion of the peri-superior vena caval syndrome , and one had neoplastic obstruction of the inferior vena cava as it entered the thorax .
C0003504
aortic regurgitation
C0817096
thorax