Representative Angiogram Illustrating Aortic Banding Technique for Pressure Overload-Induced HFAngiography from a male Yucatan mini-pig (8 months old) showing placement of the aortic band (anatomically marked by radiopaque umbilical tape) and narrowing of the ascending aorta proximal to the brachiocephalic artery (large peripheral vessels outlined by red dashed line). The systolic pressure gradient is determined by a fluid-filled guide catheter (femoral insertion) connected to a pressure transducer and measured proximally and/or distally to the banding location. HF = heart failure.