Additional Study Information: The purpose of this study is to find out, in patients with CAD who had successful TAVR with a balloon expandable heart valve, whether restoring blood flow to all blocked or narrowed arteries via PCI using coronary stents (metal scaffold) is better than treating the coronary artery disease with medications only following TAVR. The study will also compare measurements of hemodynamics (blood flow and blood pressure) that are taken during on-table procedures (TAVR and PCI) with those taken by echocardiography (heart ultrasound). These measurements are all taken as a part of standard practice for TAVR patients at Columbia University Medical Center.