Videos are labeled below as they are labeled in the book Pediatric Echo Review (PER). The number of each video corresponds to the number of the question and/or answer in the mock exam. We recommend viewing videos using Google Chrome as your browser. To enlarge a video, click on the “full screen” icon in the lower-right corner of the video image (or double-click on the video itself). To exit the expanded-video display, tap the “ESC” (escape key) on your keyboard or click on the “exit full screen” icon in the lower-right corner. To “loop” a video (play it over and over), right-click (control-click on Mac) the video and checkmark the “Loop” option; you can also set other options when you right-click.