The SMART trial is the first randomized head-to-head comparison of the two most widely used TAVR devices—the supra-annular self-expanding Evolut PRO/PRO+/FX and the balloon-expandable SAPIEN 3/3 ...

Like a rapidly expanding balloon, it swelled from a size smaller than an electron to nearly its current size within a tiny fraction of a second. Initially, the universe was permeated only by energy.