RADIO VISTA — FLAIL POSTERIOR MITRAL LEAFLET

Original: Hsu P, Shepherd C, Shokraneh K, Cabrera G, Kalivoda EJ.
Emergent Diagnosis of a Flail Mitral Leaflet With Bedside Echocardiography.
Cureus 12(7): e9374 (2020). Video 5, expanded apical four-chamber view.
Copyright © 2020 Hsu et al.
https://doi.org/10.7759/cureus.9374
https://www.youtube.com/watch?v=mf1cA8-cs6w

Current publisher PDF specifies CC BY 4.0:
https://www.cureus.com/articles/36729-emergent-diagnosis-of-a-flail-mitral-leaflet-with-bedside-echocardiography.pdf
https://creativecommons.org/licenses/by/4.0/
The Europe PMC archived article XML instead links CC BY 3.0:
https://creativecommons.org/licenses/by/3.0/
Author credit, source links and modifications are supplied for both versions.
No endorsement by the original authors or publisher is implied.

Original media retrieved from the Europe PMC supplementary archive for PMC7444964.
See source.json for filename, source hash, dimensions and extraction details.
Changes: source frames 0–23 (0.8 seconds) repeated at original 30 fps;
scale from 1134 x 720 to 756 x 480; crop rectangle [100,0,650,420],
removing the ECG strip and empty side margins. Encode as WebP, omit audio.
No synthetic diagnostic pixels and no colour-flow overlay.

Added: explanatory text, quiz and separate manual educational guides.
The posterior leaflet pointer is limited to the clearest visible interval.
Chamber contours are inset orientation regions, not endocardial measurements.
The right-heart chambers are only partly visible. The tricuspid pointer marks
the AV junction; individual tricuspid leaflets are not reliably resolved.
The left atrium is only partially visible in this zoomed recording.
Independent clinical review of added guides is pending.
Educational use, not clinical diagnosis.