Watch what the pouch does.
Three real clinical cines. Watch the pouch while the main LV gets smaller.
Pouch pointers appear on the reviewed paused frames; they mark approximate regions, not traced borders. Magnification changes display size only, not source resolution. Views and display scales differ, so compare behavior, not absolute pouch size. Enlarge a film or use the frame buttons if the small source image is hard to read. Videos are original, not generated.
Freeze the same source cine. Compare the pouch.
These are reviewed larger-LV and smaller-LV frames from the original films. The phase buttons above pause each video at its own reference time; they do not synchronize separate patients’ cardiac cycles.
Original sources, projection, licensing, and verification
This is a recognition comparison, not an exhaustive diagnostic rule or a collection of recalled ABIM examination clips. The muscular diverticulum shown here contracts with the LV; other diverticulum subtypes may behave differently. Low source resolution limits detail.